Snowflakes: You just need the bottoms of the bottles and you can use bottles in various different colors or paint clear ones, whatever you have on hand. Tie a ribbon or string at the top and you have a really cute ornament that kids will adore making.
Self watering planter or seed starter made from recycled Gatorade and soda bottles. Cut bottle in half, drill 1/4" hole in cap, string 12" yarn or string folded in half thru hole. Tie knot. Let string sit in base. Add dirt, plant or seeds, and water from the top! Easy!