This is a thick book. Why is this book so thick? It’s either loaded with fluff or has too many white pages. Alas, it is thick, but its physical pages are thicker than the average illustrated book, plus it’s loaded with fun, easy-to-understand, STEM facts about the evolution and process of rubber. To those first reactions I say, don’t be intimidated by its thickness. Instead, just enjoy the fact that Bounce! A Scientific History of Rubber is able to create a non-fiction, linear story with STEM nuggets woven in that young readers won’t be turned off by. It can be challenging to get young readers to accept illustrated books that don’t have unicorns or animals in it, thus the first hurdle towards getting them in the book is not getting in the way.