Abstract: A construction system includes at least two building elements provided with one or more cylindrical holes and one or more connection pins having a first end, a second end and a longitudinal axis. The connection pins are configured to be detachably inserted into the holes and hereby connect two adjacent building elements. The connection pins are provided with a first notch extending along the longitudinal axis and a second notch extending along the longitudinal axis, wherein the first notch extends from the first end to a position between the first end and the second end, wherein the second notch extends from the second end to a position between the first end and the second end. The width of the connection pins is larger than the width of the cylindrical holes.

Abstract: The invention relates to a toy game comprising a self-propelled vehicle (3) and at least two deflection elements (1, 2) which are adapted to deflect the travelling direction of the vehicle (3) on a base. The invention is characterized in that the elements comprise a curved, concave track for approximately frictionless cooperation with one of the sides of the vehicle and comprise an underside and a grip configured such that a player can reorient and move the element on the base of the vehicle quickly and without obstacles.

Abstract: The invention relates to a toy game comprising a self-propelled vehicle (3) and at least two deflection elements (1, 2) which are adapted to deflect the travelling direction of the vehicle (3) on a base. The invention is characterized in that the elements comprise a curved, concave track for approximately frictionless cooperation with one of the sides of the vehicle and comprise an underside and a grip configured such that a player can reorient and move the element on the base of the vehicle quickly and without obstacles.