There are only 8 units in this book and my first grader didn't like 3 of them at all. He found Bats, Spiders and Exploring color very boring. He did like the boat design and buoyancy project and the one about static electricity though. The rest (colors, pumpkins, healthy heart, 3d designs) was okay, but not too interesting either. We did similar things in Pre-K and K classes. I would not recommend this activity book for kids who like exciting projects with interesting tasks and challenging exercices in a colorful book.