Enjoy hours of fun with the GraviTrax 8-99 Starter Set Speed Game by Ravensburger. This game is perfect for those who love gaming and construction toys. Build your own gravity-defying race track and watch your marbles roll down the hills and loop the loops. With the GraviTrax starter set, you can create a unique race track that will provide endless hours of entertainment. The set includes everything you need to get started, including marbles, building pieces, and a game board. Whether you're a seasoned builder or a beginner, this game is sure to keep you engaged and entertained.