The Toothpaste Millionaire by Jean Merrill reads as playful, inspiring. These 12 books share its genome — matched by how they actually read, not just their shelf label.
A brisk, cheerful middle-grade tale of kid ingenuity turning a household gripe into a booming business — light, encouraging, and quietly instructive about how enterprise actually works. Best for: middle-grade readers who like plucky-kid problem-solving and DIY entrepreneurship stories.
It's a complete, standalone-satisfying story.
It's written for middle-grade readers (roughly ages 8-12).
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