The Dynamic Tuning Set is the ideal method for adding more fun and functionality, as well as speed and size, to all your favourite Fischertechnik obstacle course based sets. The perfect booster pack for the Dynamic M, L, XL and Rolling Action sets. Many special parts such as 90 Degree curves, cross-overs, catch funnels, short and long flex-rails promise even more excitement. The Dynamic Tuning Set gives free rein to the imagination of young obstacle course engineers. Parts include 2x cross-overs, 2x catch funnels, 4x 90 Degree curves, 2x magnet holders, 6x balls, 4x flex-rails 90, 10x flex-rails 180, and various add-on elements such as angular blocks, angular girders, and more.