Make a sit upon from old vinyl tablecloths and newspapers. Sew or use duct tape to close.
Make recycled paper.
Make upcycled ornaments or other recycled art projects.
Reuse old posters or school posterboard. Those back sides can work well for your cookie signs!
Learn what you can and cannot recycle in your town.
Use an old two-liter bottle or milk jug to make a bird feeder.
Read The Adventures of a Plastic Bottle: A Story About Recycling (Little Green Books)
Make reusable bags from T-shirts.
Turn empty cookie cases or cereal boxes into magazine or book holders.