This wonderful concept is designed by Yong Jieyu. Called SkidScooter, this device can through land and water. This is has 2 different shape depend on you use it. On land it functions as a normal electric kick scooter with 2 hub motors housed within the wheels itself. In water it acts as a propulsion aid as the propellers attached wheels pushes water out in one singular direction and thus propelling the product across water.
source : yankodesign