This is awesome and keeps kids entertained for as long as the Jell-O Jigglers will last, sometimes longer! Use a wall or surface that you either don’t mind messing up or that has a cleanable surface, such as semi-gloss paint. Put a tarp down if you are inside. You can use teams or individuals. Make a different color of jiggler for each (star shapes are the best). Have each team at the same time hurl their jigglers at the wall. You can have winners in the categories of the most sticking to the wall at one time, who is the last jiggler sticking, or any other. The jigglers become stickier and more fragile with more throws, so after awhile the prize categories don’t matter. The kids just want to see the splat.
[Ed. Note: See a package of Jell-O for instructions on how to make Jell-O Jigglers. From what I can recall, you usually use twice the amount of Jell-O to water.]