Build your own marble run helter skelter marble run with this quality multi-part construction set. Follow the simple, step by step instructions to put together this absorbing 269 piece set then stand back and admire your handiwork. Or don't follow the instructions at all! Instead you can build whatever you desire. You can even combine with other Techno-Balls sets to create bigger and better designs. Contains 269 high quality snap into place pieces and features a motor driven marble chain lift to construct a hypnotising perpetual motion marble run standing over 40cms tall when finished. Includes easy to follow instructions that guide you through each step of the absorbing build process. 269 pieces to keep you tinkering to your hearts desire throughout the construction Use with other Techno-Balls sets to make whatever you like For ages 8 and above. Requires 2x AA batteries (not included). Create a fantastic office or family toy that keeps on going.