Hmm... what to do with my old Android phones?

So I have a couple of Android phones I was never able to sell and they've been sitting around the house for years. One is an HTC EVO 4G, and the other is a myTouch 3G (HTC Magic). Needless to say, they're not activated, and I was considering toying around with them this weekend on vacation.

My EVO currently serves as a makeshift Wifi router so I can pass files to my work desktop wirelessly. That's about it. Are you guys doing anything fun with your old phones? I've done the whole ROM thing to death and I've pretty much gone through all the best ROMs available for these phones.

Any ideas?