You should have an episode where everyone in the shop has to design and build their own plane that can fly a boxing glove. They can add any secret weapon of their choice on their plane that is no more dangerous than the plane itself (a.k.a. no explosives peter). They should have a time limit on how ling they can take to build and design their plane, such as an hour to design and 2 to build. Once everyone is done, they will take to the skies and the last person flying wins. These rules can be tweaked and changed but I just wanted to share these.