Wheel Blades are ski attachments for a wheelchair that allow wheelchair users to remain mobile even in snowy and icy conditions. Normally the small front wheels of a wheelchair become bogged down in snow—the Wheel Blades attach to the front wheels, eliminating the problem (they also work with strollers). Wheel Blades were created by Swiss inventor and wheelchair user Patrick Mayer. He’s accepting donations in order to finance mass production. To see Wheel Blades in action, watch this German-language video (start at the 00:30 mark):
