Play and discover with Top Trumps Activity Books! This awesome fact-filled Top Trumps activity book is packed with amazing info on the wonders of space. Why is Mars called the 'red planet'? What are Saturn's rings made of? And which heavenly body is the biggest? Find out all about our solar system's planets and stars...and find out which is the most awe-inspiring of them all! With cool activities plus 20 free Top Trumps cards to create your own fun tournament! Read more cool Top Trumps titles! Top Trumps: Baby Animals, Top Trumps: Deadliest Predators, Creatures of the Deep and Top Trumps: Dinosaurs are also available from Puffin.