Solar System for Kids: A STEM Space Adventure for Junior Scientists

Car Science: An Under-the-Hood, Behind-the-Dash Look at How Cars Work

Planes

Baby Loves Science Board Boxed Set

What Is the World Made Of?: All About Solids, Liquids, and Gases (Let's-Read-and-Find-Out Science 2)

General Relativity for Babies: An Introduction to Einstein's Theory of Relativity and Physics for Babies from the #1 Science Author for Kids (STEM and Science Gifts for Kids) (Baby University)

Astrophysics for Babies: A STEM Book about Space and Astronomy for Little Ones by the #1 Science Author for Kids (Science Gifts for Kids) (Baby University)

Peek Inside How a Rocket Works: A Fun Lift-the-Flap Book About Rockets and Space for Kids (Ages 3-5)

I am Stephen Hawking (Ordinary People Change the World)

101 Science Experiments and Projects For Children (101 Fun Activities)