SYNCFUN marble run set gives kids the opportunity to build create and explore. Experiment with the functioning of dynamic energetic and mechanical sciences defy the laws of gravity! Imagine and build your course then propel your ball to the finish! Experience the power of gravity and build your marble run! In addition the marble run game set is a must for family games which appeals to boys and girls of all ages and even parents! The first step is to build a circuit with the studs provided thinking carefully about the path that the balls will take when descending from the highest tower. Then let them slide and admire the result! Perfect Birthday Gift for kids and toddlers.