Goosebumps The Beast From The East Book 43

Ginger World and her two identical brothers, Nat and Pat, are lost in the woods. No problem. After all-Ginger did go to that stupid nature camp. Still there's something odd about this part. The grass is yellow, the bushes are purple and the trees are like skyscrapers. Then Ginger and her brothers meet the beasts. They're big-blue-furry creatures and they want to play a game. The winners get to live, the losers get eaten.