Danish heart baskets -- can be filled (with candy, money, etc)! Pinner said, "When I was a kid, I used to make these out of paper for Valentine's Day." Use felt to make a more permanent heart basket.
Ideas for used tires.Using for outdoor seating/tables as an upcycle would be cool
DIY Shrinky Dinks ~ good activity that can be done any time there is extra class time; kids take shrinky dinks home to bake plastic containers