Hubelino marble run construction set The steel marble shoots at high speed to the finish of the marble run, even through construction blocks. Use the openings in the construction blocks in a smart way as part of the marble run through which the marble can roll. If you place the construction elements in the right way, you create a compact, yet well-designed marble run. With the four cannons, children learn about magnetism. With this construction you literally take the marble run to a higher level. The set contains various tips & tricks, so that you can enjoy hours of fun with this marble run. Specifications: Gender: junior Color: black, yellow Material: plastic Age: from 4 years Contents: 84 Track elements 144 Building blocks 2 Base plate 12 Steel marbles 4 Cannons