This was my activity in the free choice activity time. It combines all the stuff I love- crafts, water, building stuff and a little bit of friendly competition. We made sail boats out of milk cartons, straws, cellophane and tape. Lots of tape! Then we decorated them with permanent markers and floated, pushed, blew and raced them down the smaller of the rivers. It was so much fun and I was supposed to be just supervising! The kids got really into it and kept modifying their boats and trying again, then a little more tweaking then another run etc etc. The time flew (sailed?) by.