My son’s 5th grade class wanted to go on an expensive field trip. So instead of having the parents pay for it, the teacher decided to have a recycling fundraiser, which also played into her science lesson plan of recycling and planet earth.
So the kids were required to bring in their used cans and every Friday she would weigh the cans and bring them done to the recyclers. The kids got so excited and would constantly bring in cans and get them from the trash etc etc, until the raised the money to go.
Great idea and great fun!