The Wild Kratts take off to investigate how different animals survive in the cold in this leveled reader! PBS's successful animated show Wild Kratts joins the adventures of zoologists Chris and Martin Kratt as they travel to animal habitats around the globe. Along the way, they encounter incredible creatures while combining science education with fun. Boys and girls 4 to 6 will love learning to read as the Kratts investigate the different ways in which certain creatures live and survive in cold climates in this Step 2 Step into Reading leveled reader. Step 2 Readers use basic vocabulary and short sentences to tell simple stories. For children who recognize familiar words and can sound out new words with help.