I highly reccomend the marketplace on here, it's a lot cheaper than petsmart/petco. Throw a background on those tanks and they;ll look 1000 times better.
If your trying to get money for plants/fish, then you should talk to your local little league (or whatever you guys have out there) and ask about umpiring. I started when I was 13, and last year at 14 I made 600 dollars (30 bucks a game, 2.5 hours per game and travel time to fields) Get to be
REALLY good friends with your umpire in chief and make sure that you appease everyone when umping but call it fair. You just need a decent idea of how baseball is played to do it, I'm by no means an expert or good at playing baseball, and I get along great. BTW you don't need to a workers permit to umpire, and it's 100% tax free. Pretty awesome...