It’s never been easier to build thrilling ball runs complete with dips, drops, curves and more! With magnets embedded in every edge, our rugged tiles connect to each other and to the translucent tracks in tons of ways—for limitless, no-fail construction possibilities. Kids just follow the steps in the full-color building guide or come up with creations of their own…then send the balls zipping and zooming! Set includes 70 pieces; longest track measures approximately 8".