Inchworm attack

Who is attacking whom? Ethan has an inch worm friend. It has inch and centimeter markings on its belly. Although it's almost as big as Ethan, he seems to be able to handle the critter and wants to chew him down to size. He hasn't figured out yet how to make it sing or squeak, but he makes it crinkle and crackle and rattle. He also enjoys chomping on a leg and looking at the bright colors. Todd and I have great fun watching him play. Who needs TV?