At the Pond unit: Science-Set up a water table. Put a plastic bag over the child's hand. Put a rubber band LIGHTLY around their wrist. It is important that the rubber band not be tight on their wrist not to cut off circulation. Have your child spread their fingers and then run them through the water. The plastic bag will act like webbed feet pulling and resisting in the water. Have them put their fingers together and run them through the water again.