This nonfiction series answers children's questions about the world, encouraging them to spring into action with experiments and activities.

"What time is it?" "What's in the fridge?" "Hello? Who's calling?" Do these questions seem ordinary? Well, they weren't always. Readers will learn how people told time by the sun before watches, why humans in prehistoric times dried their food instead of freezing it, and that before smartphones came a device with but a single application: the telephone.
The activities section allows readers to exercise their cleverness and become inventors themselves, making your own ice cream without a freezer, coming up with riddles, puzzles, games, and even an "inventor's box" for repurposing household discards into arts and crafts projects.