I couldn't say really, things I don't consider "silly" other people may.
If I had to guess I'd probably say my little box of "dress up" items such as bunny ears, cat ears, paw gloves...all sorts of odds and ends.
I know it's a bit odd but I still like to wear things like that from time to time just to be silly. xD
Makes my mom smile so everyone else's opinion doesn't matter much.