What is something you wanted as a kid and bought now that you're an adult with disposable income?
I really wanted a modded Xbox 360 when I was younger because I thought being able to play 'backed up' games and having a custom dashboard was really neat.
I ended up buying one last year to fulfill that childhood wish.
If most of my needs were fulfilled, I'll spend on buying some single-board computer to learn and play around with, and music instruments like synths, effect machines and traditional folk instruments. I also like tender coconuts (with decently thicker flesh) and palmyra palm, so I'll probably spend my money on that everyday - that counts as frivolous, right?