Fluffy the Caterpillar, an interactive children’s book, has just gone on sale for $1.39 when you factor in the Amazon coin reward. The interactive book is down from its regular price of $2.99 to $1.99 and offers a 60 coin reward. This is the first time this app has ever been on sale. It features animated creatures, high resolution illustrations, and audio narration. The app is compatible with either the Fire TV or Fire TV Stick.