What are some fund raising ideas for a club made to help animals?

I recently thought up an idea to start a club at my school to have people volunteer to help out the animals & people in wildlife foundations that need donations to help take care of all of the animals they take in. I have thought of dress down days for money to go to them(my catholic school charges for dress down days and they go to fund raisers) & having bake sales and such, any good ideas for making money for this?