STEM Kit Dynamic L2, Metal Ball Obstacle Course The complete Dynamic L2 kit guarantees even more fun with new action modules and lots of tight curves. The four flexible rails with raised side edges allow the balls to roll at full speed through curves and fly over intersections towards the rotating funnel. The 360-degree curves allow young architects to change the direction of the ball in a confined space. After passing through loops and other obstacles, the balls will return to the elevator waiting point, from where they will be brought back up with the help of the elevator powered by a small motor. The different action courses, with a length of up to 4.5 m, offer unlimited fun! The instructions also explain the effects of various physical phenomena that can be observed in the game (acceleration, mass inertia, force balance, law of conservation of energy, principle of linear momentum, laws of motion). Can be combined with the 544618 Dynamic XM, 533872 Dynamic M and 536620 Dynamic S building sets Assembly instructions to build 7 complex and original circuit models. Contains 780 pieces. Recommended age: +9 years. Made of plastic. According to EN71&ASTM regulations. WARNING: Not suitable for children under 3 years, contains small parts. Adult supervision is recommended during play. Read the instructions before use, follow them and keep them for reference. Made in Germany by Fischertechnik.