Challenge your brain with tons of do-it-yourself, interactive fun! These crosswords, sudokus, word searches, and other boredom busters will keep you entertained for hours. Blast off to the most fascinating places in our solar system! You'll get to know the planets, moons, and rockets of outer space--and test your puzzle chops while you're at it. This activity book is brimming with out-of-this-world facts, awesome photos, and endless entertainment. (Where else can you learn about space exploration AND master a crossword puzzle--all in the same book?) Plus, all this fun is packed into a handy, portable size, perfect for tossing into a backpack or taking on the road.