Via pool report from Air Force One:
Mr. Froman also talked about POTUS’s efforts to help bring reliable power to Africa, which will be the subject of an event in Tanzania on Tuesday morning. He noted as one example an invention designed to bring electricity to many of the small villages that are not connected to the grid.
POTUS will cite on Tuesday two women from Harvard who invented what’s called the “socket ball” — it’s a soccer ball that has a small electric generator inside a soccer ball. As kids kick it around all day, it generates electricity and stores it in a battery.
Mr. Froman said that he and Mr. Rhodes tested out the “socket ball” and that it will be demonstrated Tuesday (though it’s not clear that POTUS will kick the ball around or not.)