When I was about twelve and younger, I always spent my money on books and games. It would be spent quickly, sure, but I still got enjoyment out of it.
As of late, especially considering I've got a job, I've been buying "bigger" things that'll stick around. For example: A desk, chair, headphones, amp, a kindle, mp3 player, and, as of last night, I finally managed to order my damned keyboard (piano kind, not computer kind.)
And now I'm not sure what I'm going to get. I kind of ran through my mental list of to-buy stuff.
Having enough money that you don't know what to do with it is a good feeling, let me tell you.