Build the ultimate ball track with this new SMARTMAX magnetic construction set that contains an amazing 71 pieces!Build the ultimate ball track with this new SMARTMAX magnetic construction set that contains an amazing 71 pieces! With endless options you can make all kinds of crazy machines and let the balls roll. Mega Ball Run contains special parts including tubes and X-shaped bars with 4 magnetic ends. All parts can be combined with all existing SMARTMAX sets, creating an endless range of possibilities!\r\nAges 3+.