Long stories of young investigators featuring groups of children for kids aged 11 to 12 years old

Discover a captivating world of long stories, specially designed for young readers aged 11 to 12. Our tales feature groups of bold children becoming little detectives ready to solve intriguing mysteries. Each story invites your children to immerse themselves in thrilling investigations, stimulating their imagination and sense of observation. Enjoy this unique collection, available to read online or download for free in PDF. The literary adventure is waiting for you!

Stories of little investigators: groups of children (20)

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Three girls stand on a worn wooden bench under a shaded school canopy with a green metal roof: Nina, ~12, curly brown hair in a ponytail, khaki jacket and notebook, center, looking at a large glass jar of ginger biscuits with a serene, determined expression; Zara, ~12, red hair in a bun, bright yellow sweatshirt, left, holding the jar carefully with both hands and a mischievous smile; Tessa, ~11, black hair under a grey hood, right, blue ribbon in hand, shy and relieved; the concrete floor has a wide white line and crumbs, colorful posters and a metal bin on the wall, a blue “Reading Rally” banner with a fresh blue ribbon tied to it, the mood is one of repair, relief and camaraderie with soft watercolor lighting and white-pen highlights on glass and clothing.

The case of the missing cookie jar under the covered playground

Reading 22 min. 11-12 years old

When a cookie jar goes missing before the Reading Rally, school sleuths Nina and Zara follow clues through the playground and classrooms to uncover who took it and why, discovering lessons about honesty and helping one another.

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There are three children: Milo, a boy about 11 with short brown hair, wearing a navy jacket and holding a small worn notebook in his right hand, standing center near the counter and looking intently at the envelope; Lina, a girl about 11 with long light-brown hair in a ponytail, wearing a yellow shirt, holding a pen and pointing at the envelope as if explaining, positioned left of Milo and leaning slightly toward him; Jax, a boy about 11 with short black hair, wearing a red hoodie, hands in pockets but with an excited posture, right of Milo and watching with a broad smirk. Location: small lit school office with beige tiled floor, light wood counter with stacks of blue folders, a potted plant by a large window showing the courtyard and a blurred glass elevator, and colorful posters on the walls; soft late-afternoon light casts sharp, paper-cut shadows. Main situation: the coach gently extends a large sealed white envelope across the counter toward Mrs. Dalloway (off-screen, suggested by a welcoming hand); the three children look relieved; the coach’s expression shows relief and an apologetic smile; composition centered on the shiny white envelope with slight reflections and the three children forming a triangle around the focal point.

The Case of the Missing Shelter Drive Envelope

Reading 26 min. 11-12 years old

When a school's donation envelope disappears after a ride in the glass elevator, three friends—Milo, Lina, and Jax—team up to follow clues, review footage, and interview classmates to uncover what really happened.

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Four 12-year-old boys: Jayden, short brown hair, navy jacket, gently holding a moon-shaped metal box at the center front-left with a serious but kind look; Milo, light brown hair, red hoodie, mouth slightly open as if relieved, holding a bitten apple to Jayden’s right and slightly back; Theo, curly black hair, khaki jacket, arms crossed with a smirk, standing center-rear behind Jayden; Finn, pale, round glasses, plaid shirt, notebook open and pencil in hand taking notes, left near Jayden leaning toward the box. A small wooden shed at the back of a garden with worn boards, tools on the walls, stacked paint pots, warm lamp light casting long shadows, framed by leaves and scattered apples on the ground. The four young investigators discover the metal collection box hidden under dusty paint pots—a revelation moment with subtle watercolor splashes around the box, soft reflections on the metal, and mixed expressions of relief, shame, and empathy.

The case of the missing moon tin

Reading 21 min. 11-12 years old

Four friends turn detectives when Mr. Grady’s charity tin goes missing, following apple leaves, jam stains, and a taffy wrapper through the town to uncover clues and learn about responsibility.

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There are three 11-year-old girls: Mina, brown mid-length hair, attentive eyes, navy jacket, crouched left holding a small black box illuminated by her phone; Jo, black ponytail, red sweatshirt, standing right leaning with a mischievous yet worried look and one hand on a metal cart; Lia, chestnut hair, constellation-pattern hoodie, slightly unkempt, standing behind Mina with moist but relieved eyes, holding an open empty pencil case. They are in a school computer corner with rows of old desktops with thick monitors, a dented computer tower in a corner, a metal cart of keyboards and mice, cream tiled floor with dust marks, colorful posters and a trophy display in the background. The three children have just discovered the small black "Star Chip" slid under the cart; it's an indoor nighttime revelation scene with cold phone light creating bright reflections on the plastic, visible floating dust, and expressions of relief and tension centered on the open box and lit faces.

The Case of the Missing Star Chip

Reading 27 min. 11-12 years old

When a small but important robotics chip disappears from their school's trophy case, observant Mina and her friend Jo follow clues—lip balm smudges, printer logs, and computer-lab traces—to solve the mystery before the spring fair.

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Four characters: Leo, an 11-year-old boy with short brown hair and a focused face, wearing a blue jacket and holding a small open notebook, crouched left of the window and carefully folding the map; Max, an 11-year-old with tousled hair and a green T-shirt, sitting center with a relieved big smile, holding the two halves of the repaired map; Omar, an 11-year-old with tanned skin, a gray beanie and mischievous eyes, standing right and pointing at a symbol on the map as if guessing the solution; Gus, a forty-ish technician in a navy work jacket, one gloved hand, the other in his pocket, standing slightly behind, bent and kindly embarrassed. Setting: a building stair landing lit by a large paned window with a wide dusty wooden sill holding a small potted plant and stacked papers, concrete walls with damp stains, a worn green metal railing and irregular tiled floor, soft hazy late-afternoon light giving a warm watercolor look. Main action: the children calmly reassemble a torn map on the sill—pieces aligned, clear tape applied, black dust and small ink stains visible—creating a joyful, concentrated, cooperative discovery.

The Case of the Missing Map and the Buzzing Elevator

Reading 32 min. 11-12 years old

When Max's map for a school puzzle hunt goes missing, three friends methodically search their apartment building, following clues through the stairwell, neighbors, and a helpful repairman while unraveling misunderstandings.

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There are six characters: Milo, an attentive 11-year-old boy with short brown hair holding a small fabric box at the center in front of the table; Rowan, an unusually tall 11-year-old boy with pale skin and calm posture to Milo’s left, arms crossed; Jayden, an 11-year-old boy with tousled chestnut hair and a wary look to Milo’s right, leaning slightly toward the table; Nico, an 11-year-old boy with curly black hair and an exaggerated smile standing near Jayden with hands on hips; Sasha, a 12-year-old girl with a blonde ponytail and flushed cheeks standing behind the table near a poster, holding a roll of tape; Mr. Pritchard, an adult man around 50 with a large build and beige coat standing behind Sasha near the door, looking sheepish but kind. Setting: a small teachers’ room lit by a rectangular window with a worn wooden table at the center covered in colorful handmade cards and a large glittery “WELCOME BACK, MRS. KELLY!” poster, a corkboard behind the table, a stacked chair in a corner, light-colored tiled floor and warm golden light. Main situation: the children discover a bright, focal medallion on the table surrounded by handmade cards and the poster, their faces showing emotion, surprise and relief; orange candy traces and bits of tape add realism.

The mystery of the missing fair play medal

Reading 22 min. 11-12 years old

When the Fair Play Medal vanishes from the school trophy cabinet, four friends follow mysterious clues—notes, a tower, and an odd trail—to uncover the surprising reasons behind its disappearance.

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Three 11-year-olds—Milo, a short brown-haired boy in a khaki jacket, crouched left with a small notebook and screwdriver tightening a screw under a frosted glass wall lamp; Lina, a black-haired girl in a red puffer, standing right with arms crossed, holding a rolled blue poster and a mischievous smile; and Owen, a black-haired boy in a navy cap and gray backpack, standing behind them looking embarrassed but relieved, ready to hang the poster—are carefully rehanging a large blue poster on a brown cork display board in a cream-walled community center corridor with beige linoleum, a smoked-glass door and a small table with cups in the background; warm light from the repaired lamp highlights tape traces and loose hairs on the board, creating a precise, honest end-of-investigation mood in thick gouache-like textures and warm colors.

The Case of the Missing Blue Poster

Reading 24 min. 11-12 years old

When Milo and Lina investigate a missing community-center poster, the clues lead them beyond the building and uncover unexpected motives and mischief.

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There are four children: Mina, girl, ~11, brown hair in a ponytail, red jacket, center, holding a shiny keychain in her right hand and looking at the open metal box; Jax, boy, ~11, tousled blond hair, green t‑shirt, left, smiling with a knee bent as if jumping with excitement; Zara, girl, ~12, short black hair, round glasses, blue coat, right, notebook and pen in hand, writing quickly while watching the box; Eli, boy, ~10, light brown hair, yellow sweater, just behind Mina, holding a packet of cookies and looking astonished. Location: underground concrete parking garage with numbered pillars with peeling paint, long white neon lights on the ceiling, dark parked cars, dusty floor, blue chalk arrows on the walls, and a small open metal wall hatch revealing a metal box and an old notebook. Main situation: the four children have just opened the secret hatch and discovered a box of shiny enamel badges and old photos; mood of discovery, faces lit by cold neon light, sharp details: fishing line on the floor, a blue feather on the concrete, a crumpled ribbon, and faint metallic reflections on the box.

The mystery of the missing keyring and the secret helper badges

Reading 21 min. 11-12 years old

When a building's spare keyring vanishes, four friends follow rhymed clues and puzzles through stairwells and the underground garage to uncover who hid it and why, learning about caution and honesty along the way.

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Three girls, about 11: a light-brown-skinned girl with black pigtails wearing a mustard-yellow jacket and blue backpack holding an open notebook and looking at the glass display to her right; a freckled girl with light-brown hair in a ponytail wearing a green sweater and rubber boots leaning left and pointing at a small water mark on the inner edge of the display; a curly brown-haired girl with round glasses in denim overalls and a red scarf holding a navy velvet pouch at the center, ready to return the medal. Setting: bright school corridor with shiny beige tiled floor, an open glass display case with trophies and ribbons, colorful school posters on the wall, soft shadows from large right-hand windows and visible dust motes. Main scene: the three young detectives solemnly and peacefully returning the kindness medal into the open display, focused and relieved expressions, composition centered on the display and the hands placing the medal, soft watercolor texture with visible granulation and a muted palette of mustard yellow, sage green, denim blue and brick red.

The Case of the Missing Kindness Medal

Reading 31 min. (2) 11-12 years old

Three friends investigate the disappearance of their school’s Kindness Medal, following small clues that take them through the school and a local zoo while they learn about cooperation and careful questioning.

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There are three characters: Zara, an 11-year-old girl who is small with brown hair and round glasses, wearing a blue t-shirt and jeans, crouching and closely examining the ground with a sketchbook in hand; Lina, also 11, tall with curly hair and a mischievous smile, dressed in a colorful dress and sneakers, standing next to Zara with her arms crossed, curiously watching what Zara discovers; and Nia, an 11-year-old girl who is slender with braided hair and a serious expression, wearing a green t-shirt and shorts, standing behind Zara, observing the scene with a focused look. The setting is a bright and colorful playroom filled with scattered toys, multicolored blocks, and drawings on the walls. In the center, a large art table is covered with crayons, paper, and paint, with sunlight filtering through the windows, creating a joyful and lively atmosphere. The main situation shows Zara, Lina, and Nia in the middle of an investigation to find missing giant crayons. Zara is examining the ground, discovering bits of colored wax, while Lina and Nia exchange ideas about what might have happened to the crayons. Excitement and curiosity are evident on their faces as they dive into their investigation.

The Case of the Missing Mega Crayons

Reading 46 min. (2) 11-12 years old

Zara and her friends set out to solve the mystery of the missing mega crayons at Sunshine Corner Daycare, following clues and crumbs left behind as they navigate through the chaos of toddlers and art activities. As they unravel the puzzle, they discover that not everything is as it seems in their colorful world.

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There are three characters: Ben, a 10-year-old boy with messy brown hair and round glasses, wearing a blue t-shirt and beige shorts, crouching to examine a handprint on the trophy case. Theo, also 10, has blonde hair and glasses slipping down his nose, wearing a red plaid shirt and jeans, standing with a notebook and pen ready to take notes. Jamie, another 10-year-old with black hair and a mischievous smile, is wearing a green hoodie and sneakers, leaning forward and pointing at the missing trophy in the display case. The main setting is a bright school hallway with yellow-painted walls and colorful posters. In the background, there is a glass case with sparkling trophies, but the largest, the School Spirit Trophy, is missing, leaving an unsettling void. The main situation shows the three friends investigating the empty case, looking focused and determined, with curious expressions as classmates pass by, indifferent to their inquiry.

The case of the missing school spirit trophy

Reading 13 min. (10) 11-12 years old Available in audio story

Three friends, Ben, Theo, and Jamie, embark on a thrilling adventure to uncover the mystery of the missing School Spirit Trophy from their school, following a trail of clues and suspects that leads them to unexpected revelations. As they investigate, they discover that things are not always as they seem, and the true story behind the trophy's disappearance unfolds.

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There are 5 characters: Mia, a 12-year-old girl with curly brown hair and round glasses, wearing a bright yellow t-shirt and blue jeans, crouching and examining dust traces on the floor with a magnifying glass; Theo, a 12-year-old boy with messy black hair and a red checkered shirt, standing slightly back with a notebook in one hand and a pen in the other, taking notes while observing his friends; Jasmine, a 12-year-old girl with long, smooth hair tied in a ponytail, wearing a green jacket and black pants, pointing at a bulletin board with a focused expression; Leo, a 12-year-old boy with blonde hair and a big smile, wearing a blue t-shirt and shorts, kneeling and rummaging through a recycling box with curious eyes; and Dev, a 12-year-old boy with brown hair and a blue cap, dressed in a sequined musician's uniform, standing a bit back with a worried look while watching the group. The main setting is a spacious gym with polished wooden floors and walls decorated with colorful banners. Sports cones and hoops are scattered on the floor, and sunlight filters through large windows, creating bright patterns on the ground. The main situation shows the children in the middle of an investigation to find a lost whistle, carefully examining the floor, scrutinizing dust traces, and discussing among themselves, each contributing ideas and discoveries in an atmosphere of mystery and excitement.

The case of the missing whistle

Reading 21 min. (1) 11-12 years old

When Coach Ramos loses his lucky whistle just before Field Day, four friends embark on a detective adventure, following clues and unraveling a mystery that involves unexpected suspects, erasable ink, and teamwork. As they piece together the puzzle, they learn the importance of patience and curiosity in solving problems.

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Long stories of young investigators featuring groups of children for kids aged 11 to 12 years old

Stories of little investigators: groups of children (20)

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