Mr. King likes pretty things. He also likes machines. So when he discovers a flower that has been nibbled by a caterpillar, he builds himself a Caterpillar-Catcher. Off he zooms--unaware that his machine is filling the sky with smoke and that his friends are calling him to stop! When he finally does, his friends are not happy. But with some imagination, Mr. King figures out a way to green his machine--and the world around him!