Bowls made of confetti! Great recycling art project--save all those leftover paper scraps (put in small bowls at each table). Collect a bunch and have the kids cut them up; Then make bowls made from confetti.
Christmas wrapping idea: Buy brown wrapping paper (cheap to buy at Walmart or a craft store) and use that paper to wrap your gifts. It's useful for every gift, and you can customize it by writing on the paper.