They were in the Clearance bin of my Superstore up here in Canada. I have seen them in Walmart too in the sled/snow shovel area. They are a kind of thin plastic that has a hole in the front to hold onto and they are flexible so that when a child sits on them to go down a hill, the plastic curves up so they can hold on through the handle. I'm thinking I'll pick up a couple and give it a go.