A rope bracelet - reminds me of making friendship bracelets back in the day. My right second toe used to go numb because I'd hook the end of the bracelet over it, and then knot embroidery floss for HOURS.
Kids love nature and enjoy creating artistic representations of animal life. Take a look at these homemade animal themed toilet paper roll crafts. They are cool, fun and could be a great project to do with the kids.