The idea for this fun and easy activity came from wikihow at http://www.wikihow.com/Make-a-Boat-in-a-Nutshell.
Step 1: Gather Your Materials:
• Crayons or markers to decorate your sail
Step 2: Crack the Nut in Half
• Hazard (If using a nut like walnuts, cracking will require a hammer or knife, so be sure to crack nuts for children)
Step 3: Cut a Triangle Shape From a Piece of Paper for Your Sail
• Cut the sail according to the size of your nut. The smaller the nut, the smaller the sail.