What is a butterfly Author:Chris Arvetis and Carole Palmer "Can you tell me, Squirrel, what is a butterfly?" asks Christoper. "Butterflies were once caterpillars," says Squirrel. Then Christopher watches some eggs hatch and learns what happens next. — The JUST ASK series explains the world to your child. In simple words and colorful pictures, these Weekly Reader books answer questions your youngster l... more »ove to ask.« less