Heres a pick thats both timeless and on-point.
What is our universe made of? How do planets move? What is kinetic energy? This encyclopedia will answer these and more whats and hows for you. Learning is made simpler with well-labelled diagrams, and an extensive glossary of difficult words. Bonus: the book comes loaded with Isnt It Amazing a section of fun facts to keep you glued for more.
Heres an item that works for every age, every stage.