The Arbeitsausschuss Kinderspiel + Spielzeug e. V. (German Working Group on Children's Play and Toys) of the spiel gut (play well) association, whose head office is in Ulm, tests and evaluates toys. It also provides information about the importance of play for children’s physical, mental and social development. The working group is made up of around 40 experts from education, psychology, sociology, medicine, design, technology, environmental protection and other professions. They work on selecting and recommending good toys and games in regular jury meetings. The individual toys and games are tested with children and evaluated and marked in accordance with strict criteria. The “spiel gut” sign is the only design certification that is orientated towards children’s education.