Are you searching for the perfect pool accessory? Pool noodles and inflatable alligators are cliché, and fountains are little more than expensive decorations. What if there were a way to improve your swimming skills and show off your DIY prowess? Why not create your own hydro propellers? After funding a Kickstarter for Blue Robotics T100 thrusters, YouTuber PeterSripol used the devices to make "hydro fists," which attach to the wrists and propel the wearer through the water. He later expanded upon the idea, creating a lightweight, handheld hydro scooter pistol that puts propulsion in the palm of your hand.