Shop for your baby! This work that has the structure which seems a combination of an existing shopping cart and a bicycle is inspired by a typical scene that parents carried their children by the shopping cart at shopping malls. The existing shopping carts cannot allow mothers and their children to do shopping separately. As a result, the children often grumble for obtaining what they want to buy. CartRider, however, is able to be driven by children as if riding a bicycle so that the children can put product they want to buy into the cartrider.