Each building set can be combined with the rest of the Gravity line, for an endless play experience. Use all your ingenuity to come up with new combinations. Geomag has reproduced the famous ball bearing invented by Leonardo Da Vinci, to set in motion our magnetic constructions with a totally new play platform. Build your amazing Geomag models on top of the ball bearings and use the repelling forces of the magnets to magically create movement, with no contact. Suits ages 7 years +.