using tape or another fashion. on the dull end of the skewer, tie the other end of the string holding the cup. the students should be able to add weights to the cup. when the skewer twists, it should now cause the string to wrap around the end, raising the cup.
give groups of students a foam ball to use as their center. this ball will be attached to the front of the windmill base, opposite the string and cup. demonstrate how the windmill works with the students by attaching the foam ball and twisting it. remind them that their goal is to cause the windmill to generate power by lifting 