If you like playing with a kickball and you like homemade ice cream, you'll love the Yaylabs! SoftShell Ice Cream Ball.
OK, a few issues to get out of the way here: First, the Yaylabs! SoftShell Ice Cream Ball makes a relatively small serving of homemade ice cream per use compared to most ice cream makers. And second, the thing leaks pretty heavily, so you need to use it outside. But guess what? All big rubber balls are best used outside anyway, and not all such balls make ice cream while you kick or toss them around. And besides, it leaks salty water, not sticky ice cream, so it's not that big of a deal anyway.
Here's how you use this thing: Add your cream, sugar, and flavoring into the chamber on one side, put ice and rock salt into the other, close the lids, and play around. Kick the ball, throw it, roll it — you can do pretty much whatever you want with the thing as long as you keep it moving.
After about a half hour of play, you will have worked up a sweat and an appetite. Take care of both by opening up the end into which you put that cream and sugar and vanilla or chocolate or whatnot and scoop out some fresh, cold ice cream.
Is this partly a novelty item? Sure. But the ice cream tastes great. And yes, I know that first hand.
One Amazon customer calls the Ice Cream Ball a "great idea" that makes tasty desserts and is "easy to clean," though you should note that multiple people mention the leaking issue. If you have decent outdoor space, it's not that big of a deal, really.
Pros: Easy to use, easy to clean, promotes exercise and play
Cons: Leaks fluid during use
Buy the Yaylabs! SoftShell Ice Cream Ball on Amazon from $33.29 (price vares by color)