Building blocks - with a twist! The cool thing is, you're building essentially horizontal structures to make marbles move, so the key (and satisfaction) involves how you position the holes in the blocks. You must use your noggin!
Our Basic Set of 49 pieces includes blocks, rails, and a twist. The Twist and Rail Set includes a twist and 97 pieces. Both sets include 50 marbles and terrific instruction books. Add special effects with the 11-piece Switch Set that includes a "speedmaker," and allows you to let marbles go one at a time or all at once.
Quadrilla
