We had lots of fun making and playing with Rotor-Copters. They work like a mini helicopter. They were great fun to throw up in the air and watch them spin around really fast to the ground. 
We all made a big one and a little one. We wanted to find out which one was better at flying. 
We decided the little one stayed in the air longer and spun around much faster. We wondered why that would be?
Allan discovered that if you throw the little one upside down, it turns itself back up the right way. 

Rotor-Copter Fun on PhotoPeach