Luna, Jupiter, and Clyde are playing soccer with Tom, Alice, and Igor when they discover a spider web in the backyard! But they wonder, how do spiders build their webs? Where do they get the string to build to build it? After a little experiment that doesn't quite answer all their questions, they decide to make believe they're little spiders themselves and find out just how to make a spider web. They learn that spiders catch bugs in their sticky webs.