READING RAINBOW is a magazine program for children that introduces a w ide range of educational topics that promote awareness of the world an d inspire reading. In this episode, host LeVar Burton introduces kids to the concept of a chain reaction. LeVar bowls at his favorite bowlin g alley, travels to a bowling ball factory, and watches his friend Bob set up a long series of dominoes to show how one thing leads to anoth er. The episode also features the book IF YOU GIVE A MOUSE A COOKIE, w ritten by Laura Joffe Numeroff and read by Beth Howland, about how giv ing a mouse a cookie causes a variety of unintended things to happen. The kids review the books THE HOUSE THAT JACK BUILT, THIS IS THE KEY T O THE KINGDOM, and SMART DOG.