I have always wanted to try one of these Yonanas Ice Cream Treat Makers  (they have good infomercials).
Right now Amazon has it on sale for $34.99 (it’s about $50 everywhere else).
Yonanas turns frozen fruit and other flavorings into a delicious, healthy soft-serve treat. The unit combines frozen bananas and any additional fruit or chocolate and instantly churns the ingredients to produce a treat with the texture of frozen yogurt or soft-serve ice cream, but without the additional fat, sugar, or preservatives. The chute easily accepts berries, sliced mango, or cantaloupe along with frozen banana, and the integrated spinning blade mashes and incorporates the fruit into a silky-smooth confection with the texture of soft-serve ice cream or yogurt. The chute, plunger, and blade are dishwasher safe.
I am REALLY tempted to order this!
Be sure to double check the price before you buy- Amazon prices change quickly!