Talking about shed plans, we have some new ones for building a small boat
. If you are into woodworking, they wouldn't be too hard to do. My grandchildren and their father build some small boats together and they had a lot of fun doing it and also had fun out on the water when their project was finished. Is the fishing good where you live? You could get them to help you so they could learn to use the woodworking tools the proper way. Perhaps they would enjoy it as a hobby.