You have a tent with a jackhammer in it for the festival! Festivals need booths where people can do activities. In this tent, festival goers can use a jackhammer and make a lot of noise, perfect for a festival!
This festival is for cyborgs (さい) only. Picture the cyborg you made getting excited that you're taking it to the festival. That's why all of the activities have to do with heavy machinery. The rides are mostly just cyborgs letting other people ride them, but it's still pretty fun.