PBS's hit animated show Wild Kratts follows the adventures of zoologists Chris and Martin Kratt as the duo travels to animal habitats around the globe. Along the way, they encounter incredible creatures while combining science education with fun. Boys and girls ages 4 to 6 will dive into this Step into Reading collection featuring five Wild Kratts leveled readers about big cats and felines, wild dogs and canines, creatures that fly and creatures that can survive in the coldest places, together in one volume! 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.