The toys set also features an elevator, space-themed elements, and a glow-in-the-dark tower, adding an extra element of excitement to the marble run experience. ENDLESS EXCITEMENT: The marble run set consists of 300 pieces, including 181 see-through marble run pieces, providing a clear view of all the action as the marbles race down the marble track. With this set, kids and adults alike can enjoy hours of fun building and designing their own marble run tracks.