Flies are annoying, no news there. Enter Bug-A-Salt, the mad scientist invention of Lorenzo Maggiore, a plastic shotgun that sends salt rocketing towards pesky flies giving them no chance of survival. We'll keep things in high gear when we meet the world's coolest Dad, who has built a rollercoaster for his kid, right in their backyard. Then it's off to brainstorm with a couple of engineers trying to break a world record for the fastest hot tub on wheels. Going fast also means safety first, which is what Draggin' Jeans are all about. They'll show us how they're keeping motorcyclists protected with their Kevlar bike denims. And last but not least, we'll climb inside a giant15-foot walking robot named Prosthesis as it takes it's very first robo-steps.