There was a new ride I have never seen before this year at the Fair. It was a pool with air-filled plastic balls that had kids inside them. Here is the video of how the kids get inside. Once they are sealed in, they are just like human gerbils in those little plastic balls that roll around.
They already have Habitrails for kids at some restaurants where they run around in tubes that connect to each other, so I guess I should have expected this would come to fruition.