Give your kids endless hours of engineering fun with the Mindware Marble Run game. This engineering game gets the fun rolling, literally. The kids can build tracks that twist and turn with colorful pieces that simply slide together. They can test their design by sending marbles through chutes, merry-go-rounds, windmills, S-curves, a U-turn slide and centrifugal funnel, then make adjustments to send it off again. MindWare Marble Run encourages creative and imaginative play by building simple or complex runs.