Movable parts make these factual books fun to explore. 
Let’s Look at Dinosaurs
by Frances Barry
Candlewick Press
ISBN: 978 0 7636 5354 5
Audience: ages 3 – 8
This dinosaur book is a simple one, with bold images and large, abbreviated text on each page. Each spread introduces one important identifying fact about a particular dinosaur, and illustrates it with a moving part. In most cases, this is a flap that reveals something, but there are a couple of pop-up elements as well, for variety.
This book’s wonderful simplicity makes it perfect for preschoolers and primary grades, when children are able to manipulate flaps without tearing them from the page, but can be overwhelmed by lots of facts. Kids at this age often love dinosaurs, too, so it is very well-pitched. The collage illustrations have a bold, retro charm that I am really enjoying, and suspect that design-oriented parents will gravitate toward. For a young dinosaur fan, this is a real winner, and definitely worth the purchase. 
How the Weather Works
by Christiane Dorion
Templar Books
978 0 7636 5262 3
Audience: ages 5 – 10
We listen to the weather every morning in our house – and every kindergarten classroom I know talks about and charts it, too, so the questions are bound to come. “What makes the weather?” This new book about weather is stuffed with facts in easy-to-understand language, and illustrated throughout with fun moving bits that help show how all the elements relate to each other.
From fronts and winds to predicting the weather, extreme weather, and climate change, this book covers a wide range of weather topics admirably and with more interest than you might think weather would merit (at least, if you’re me). Whether (heh) your kid is simply curious or needs to do a project, this has enough information to answer as well as entertain. A worthy companion to last year’s How The World Works.