Beth,
I have champagne ideas too, but my budget pretty much fits my taste. Having said that, one of the ways I get supplies for acitivities is by putting a "wish list" in our monthly newsletter. I list most of the supplies I need for the month along with staples i.e. paint, glue, paper, scissors, coloring pencils, etc. that we use regularly. This has been so successful, that I usually don't use all my annual budget. I've found that when you ask for something most people will give, and if they don't someone else will.
Good luck!
pickles