STEM Kit Dynamic M, Metal Ball Obstacle Course New components that create sound and action open up even more possibilities for fun races! While racing in the obstacle course, the metal balls create melodic tones. The rotating funnel offers a completely new way to bring the balls to the next track. The balls will also fly through the obstacle course, through intersections and narrow curves. When the balls arrive at the end of the race, the manual chain lift brings them back to the start. The Dynamic M construction set is ideal for building 4 fun and exciting tracks. Can be combined with the 544618 Dynamic XM, 536620 Dynamic S and 536621 Dynamic L2 building sets Assembly instructions to build 4 complex and original circuit models. Contains 550 pieces. Recommended age: +7 years. Made of plastic. According to EN71&ASTM regulations. WARNING: Not recommended for children under 3 years of age, 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.