Part One
Sam wakes up with a big idea. He is four. He is small. He wears a red hat with a star. Sam says, "Today I will be a helper-detective."
Sam hears Mama say, "Someone left a surprise in the mud." Mama points to the back door. There is a little mess on the mat. "Oh," says Sam. He pats his hat. "I will find the surprise."
Sam puts on his tiny boots. He holds a magnifying glass — it is a toy, but it makes him feel brave. He steps outside. The garden is bright. The sun is warm. The grass is green. Sam smells fresh air.
On the path, Sam sees a track. A round, soft smudge of mud. It is brown and a bit shiny. Sam crouches. He says, "Look. A muddy trace." He taps it gently. It smells like wet earth and rain.
Sam decides to look for more traces. He wants the reader to help. "Can you help me look?" he asks. "Look for brown dots," he says. He points with his finger. He walks slowly.
Sam finds another smudge by the big yellow flower. It is the same shape. He counts. "One, two," he sings. Counting makes him calm. He is careful. He follows the mud like a little game.
He meets Mr. Robin on the fence. Mr. Robin is a bird who likes songs. Sam says, "Hello, Friend. Did you see the mud?" Mr. Robin chirps and flaps. He points with his beak to the gate. Sam nods. "Thank you," he says. Gratitude makes his heart warm.
Part Two
The trail of mud goes to the old shed. Sam opens the door a tiny bit. "Peek," he says. Inside there are tools, a blue hat, and a big watering can. On the floor is a muddy shoe. It has a small leaf stuck on it.
Sam looks at the shoe. It is big. It is not Mama's shoe. It is not Papa's shoe. It is too big for Sam's feet. It smells like grass. Sam whispers, "Who wore you?"
A soft nose sniffs at Sam's knee. It is Poppy, the neighbor's dog. Poppy wags her tail. She has a little mud on her paw. Sam laughs. "Hello, Poppy," he says. "Did you play in the mud?"
Poppy barks once. She grabs a stick and drops it at Sam's feet. Sam thinks. He remembers seeing Poppy at the gate this morning. He also remembers a pile of muddy prints near the fence. The trail goes past the fence and stops at the street.
Sam steps outside with Poppy. He points to the ground. "More mud," he says. The path leads to the neighbor's house. The door is open a crack.
Sam hears a gentle voice. It is Mrs. Green. She is watering her flowers. Her shoes are muddy too. She looks surprised. "Oh!" she says. "I did have a little spill. My boot slipped in the rain."
Sam shows her the tiny prints and the big boot. "We found the trace," he says proudly. He tells her about the big muddy shoe and the leaf. Mrs. Green laughs softly. "Thank you, Sam," she says. "You are a kind helper."
Sam feels warm. He says, "You are welcome." He feels proud. He pats Poppy. Poppy wags and licks his hand.
Now Sam asks the reader again, "What else can we check?" He points to the flower pot. There is a small toy car under the pot. It has a speck of mud. Sam picks it up. "Aha!" he says. "The car rolled. It made the trail."
Mrs. Green smiles. "Yes," she says. "My wheelbarrow tipped. My boots and Poppy's paws made tracks." She kneels and dries the porch. Sam helps with a rag. He wipes the steps. He sings as he cleans. Cleaning feels good.
Part Three
The case is nearly done. Sam sits on the step with a cookie. "We solved it!" he says. He tells the reader, "You helped me follow the muddy trace. You helped me count and look."
Mrs. Green gives Sam a little thank-you card with a sticker. Mama gives Sam a big hug. "Good job, little detective," she says. Sam feels very happy. He folds the card carefully in his pocket.
Sam says thank you to Poppy, to Mr. Robin, and to the sun. He says thank you to the reader. Gratitude makes everyone smile.
That evening, Sam puts his red hat by the bed. He whispers, "Good night, mud. Good night, friends." He dreams of new tiny mysteries. He knows he can always ask for help. He feels safe and loved.
The mystery ended with a smile. Sam solved it with kind eyes, small steps, and a little help. He learned to look, to listen, and to say thank you.
