How the braid runs. Push the captive moon runner with a thumb and it drops into the raised figure-eight channel, tracing one continuous braid where the two loops cross at separated bridges instead of colliding. Keep the thumb moving and the runner threads both crossings, finishes the full route, and rolls back to its starting post.

One solid printed piece. The track, both bridges, the rectangular frame, and the captive runner come as a single interlocking piece, nothing to assemble and no loose parts to lose. The frame spans 4.6 by 3.3 inches and stands about 1 inch tall, with fine layer lines tracing every rail of the channel.