For St. Patty's Day, I decided to make paper boats. This is a very simple activity you can do with the kids. All you need is paper and a flat surface. If all you have is plain paper, you can have the kids decorate it in St. Patty's Day theme before making the boats. Then there is time to play with the boats afterward. This You Tube video is very good at explaining how to make paper boats if you don't know how to already.