What to do with an old helmet?

[Gone in 60]

I tried to find ways to recycle old helmets. in L.A. for a while, there was a group that would collect old helmet donations and ship them to third-world countries where they didn't have any, thinking old was better than nothing. They disappeared.
I took a few to the fire station around the corner from my house, thinking they might want them for training - removing helmets safely from downed riders. They weren't interested.

I ended up donating the ones that weren't damaged to goodwill, and cutting the straps off of the bad ones and tossing them in the dumpster.