Spacerail launched in 1984 by the United States， in discontinued 20 years later， and now re-engraved market， which is a model， the player can be freely combined to set up the track， you can make your own ball in the track as a roller coaster of operation， Spacerail divided into 1-8 different degrees of difficulty， is a full of intelligence， logic and creativity of the game， as long as you have enough creativity， you can use the highly flexible accessories， design a variety of different amazing track. You can see a larger version in the entrance hall of science education in Taiwan， we can see the world's largest version (already with beads as big as a bowling ball) at the Hong Kong Science Museum. (■ Source Wikipedia) If you say the most sophisticated version， than the movie flaws (Fracture) in version (■ Picture from IMDb) Unfortunately， these special edition did in selling， but some people on the Internet will also do all kinds of toys modified version of Hello， who are interested in their own search for keywords movie package you will generate more ideas. Currently divided into 1-8 different degree of difficulty， the difficulty of this product is at Level 1， players can follow the instructions on the design， assembly and track， you can also create their own. Caution: ► Take care of children swallowing small parts ► This product is suitable for children 15 years old or more