How Do You Say Water Wings in Chinese?

Day two without English saw me trying to explain the following things: water wings (those little arm floats that kids wear), depositing money in an ATM, and puns.  How do you explain what a pun is, let alone why it is funny, when you only know a few hundred words?  I failed miserably, so my roommate will have to live without knowing that particular English word.  I think he'll be fine.  His name is Lu Yao, and so far he's been awesome.  He and I spent an hour and a half flipping through my car magazines last night.  He taught me how to say pretty much every car manufacturer's name in Chinese, from Chevrolet to Rolls Royce, and everything in between.  He even taught me how to say turbocharger, classic car, and convertible.  I was ecstatic.    We even went to dinner tonight.  Needless to say, I let him order.  This was a mixed blessing, as we ended up with three delicious dishes, but one of them (the one on the right in the above picture) was pig kidneys.  Frankly, it was fantastic.

EJR