Sid investigates rainbows and learns they can only form when light passes through water droplets.
After a rainstorm, the sun comes out and Sid spots a big rainbow in the sky. He races inside to tell his parents, but by the time he brings them outside to see it, the rainbow is gone. Sid and his friends investigate rainbows at school where they discover that rainbows can only form when light passes through water droplets. (Educational objective - Rainbows)