The innovative principle of these toys is characterized by basic elements (squares and traingles) that are magnetized thanks to a particular magnet, the neodymium, that attracts but never repels. This particular proprerty guarantees endless games since the different elements lock to form many constructions. It is possible to build your construction flat and then "lift" it to become 3D by pulling it from its center of gravity. There are many sets available, for kids of 18 months and up to teenagers.