I have been doing this activity for 24 years and it never disappoints. The Powerpoint presentation begins with a cute story of a ghost who wants to do a crazy trick like his friends. It's up to the students to figure our how to make him spin. The students move the cut out ghost (provided) into different position and test which one is most effective. Afterwards, I've provided some discussion questions which are great way to lead a discussion about air and helicopters). I let the kids decorate the ghost to take home. I currently teach fourth but I've used it in sixth and they like it just the same!