Quick ways to collect money, for teenagers.?

I'm not allowed to have a job yet, but I need a way to get money that I will use to buy donations for my local animal shelter with.

Fundraising chocolate
Lemonade/baking/fruit stand/crafts
( if people know its for a good cause they will be willing to buy)
Sell: old clothes to secondhand clothing stores,
CDs, video games, records and things to record stores, & books to secondhand book store etc
You may need a lot of CDs or books to sell to make a reasonable amount though.

I would also suggest an advertised Garage/ Yard sale with a range of different things & homemade baking :)

Good luck!!