Hahaaa "Powers out...time to juice!" I have a emergency radio and the solar panel on it is very weak so two hurricanes ago we took turns cranking the handle to get music as a fun little distraction. This reminds me of that but at least you get a small drink after.
We had a Dazey butter churn my mother bought to use with her kindergartners, but we had fun with it at home too. Fresh sweet butter on hot bread, oh my!