It’s just great to have a giant construction set for children to spend some time building an almost real size boat or a train in the garden. But how awesome is the idea to add rotating wheels to the set?! This Giant Polydron Vehicle Builders Set helps children to understand how things work. We could make all sorts of models from a bus to a racing car, but Max prefers tractors. After we finished building one, Max had a lot of fun pushing it around.