George is excited to attend his first sleepover, but he doesn't anticipate how worried he will feel, and luckily, his friends are there to help him overcome his homesickness.
There's a chance of rain in the forest, and George wants nothing more than to catch sight of a vibrant rainbow across the sky. When the weather makes his wish come true, George chases the rainbow and learns all about colors, weather, and the effect of light.
In this, the original book about the curious monkey, George is taken from the jungle by the man in the yellow hat. and the newly-captured monkey gets him into continual trouble.