8 Little Planets A Solar System Book for Kids with Unique Planet Cutouts

Chris Ferrie, who also created the Baby University series, sets this solar system book to the tune of "Ten Little Monkeys Jumping on the Bed," giving each of the eight planets a little personality that lines up with something true about it — slow, distant Neptune feels left behind because its orbit takes 165 years, while the innermost planet spins through its day in a hurry. The sing-song counting structure and die-cut planet pages are built for ages 3 to 5 across 18 board-book pages, short enough to read as an actual bedtime book rather than a science lesson in disguise.

Turning real orbital facts into feelings a small child already understands — feeling slow, feeling left out, feeling rushed — is what makes the science land without needing any explanation of what an orbit actually is. The counting-rhyme format doubles as number practice, so a child is absorbing sequence and quantity alongside the planet names without the book asking for extra effort on either front. It's a reasonable pick for a family that wants a bedtime book with some real content underneath the rhyme, or for a kid who's already latched onto space as a favorite subject and wants the solar system rendered as a story instead of a diagram.