The students can't use their stash (that's 0.2247 BTC, according to current exchange rates) to shop from Amazon, but they're free to spend it on whatever they want. So, here are a few suggestions:

Go to Yelp to find local businesses that accept Bitcoins and hopefully eat something better than canned goods.

Access Square Market to buy from and support small businesses, if $100 is chump change to them.

Get a Bitcoin debit card, so they can use their Bitcoins to pay in any establishment that accepts Mastercards.

Rubin and Elitzer are still working out how to distribute the money to 4,528 undergrads. But once they've accomplished that, MIT might have the biggest concentration of people with access to the cryptocurrency.