They have a new pinball machine in the classroom. It is a special "light" pinball machine. They try to shoot light through a prism and get it to refract into various eyes matching certain colors. They go in the schoolbus and use different objects and mirrors to reflect the light into the eyes. One kid stays behind and works to distract the principal who came to visit. He does it just long enough for the kids to win and get out. By winning, Ms. Frizzle gets to keep the pinball machine. Otherwise, we learn the principal would have had it. The explores how colors work, but feels less in depth than other books in the series.
