Kraul Spielzeug
Kraul is a German family business that encourages a love of nature, observation, and experimentation. Using the basic elements around us (earth, fire, wind, and water), Kraul's STEAM and engineering science kids allow kids to wonder at the world and inspire hours of nature based play.
A heavy steel ball under the hood drives the WENDOLIN. As soon as its track (e.g. a wooden tray) is slightly inclined, it always drives forwards downhill, even if it has to turn around first.