Though i thought of this idea after making my other project (yet to be completed....yet related), one day, as the creative foodie i am, i noticed that the design of the play and freeze (which is basically a plastic cage and a metal container) was basically a hamster ball (to be correct, its called a critter krawlerl), and basically all you have to do is make a few modifications.
==The beginning of summer==
Just buy hamster ball you think is good enough for you and buy a metal container that hopefully fit in there.
Now, the only required materials other than the hamster ball and metal container are:
(note: when buying the hamster ball, be sure it has screws in it)
-Hot glue (so you can fill in the holes which were meants for oxygen) ($1)
-rock salt, ice, and ingredients for ice-cream ($2)
-the unversal binder of all things, Duck tape ($2)
-Patience and have fun!! (priceless)
-The makers of the "freeze and play" ice cream maker http://icecreamrevolution.com/
(note: likely its too hard to play light soccer with)
-Clothes dryer ice cream, who figured. http://www.halfbakery.com/idea/Clothes_20Dryer_20Ice_20Cream