Seashell Sailboats

O and I recently had fun making seashell sailboats to float in the lake. She put a ball of playdough in each shell (we used our homemade chocolate playdough) while I cut the sails out of craft foam. I stuck a toothpick through each sail, and she stuck the toothpick in the playdough. We also made a few boats using bottle tops. Most of the boats did not float...we used too much playdough :) Also, it would have worked better with clay. The playdough dried out and fell out of the shells. The idea for this activity came from Family Fun magazine. The boats we made last summer out of sponges and straws worked MUCH better :)