Perplexus Rookie will introduce you to the three dimensional, gravity defying world of Perplexus challenges. Flip, twist and turn the sphere to navigate the steel ball along the numbered tracks through 75 barriers of varying difficulty. Perplexus Rookie is easy to play but still challenging to complete. A domed finish keeps the ball in place at the end to secure your success! Fun for the whole family. 6 1/2" in diameter.