A unique set bringing together 3 iconic action blocks from the GraviTrax range: the Hammer, the Tiptube and the Volcano; as well as a refill of 3 balls included. Hammer: a block to give marbles momentum and help them pass obstacles. TipTube: an innovative block that collects up to 3 balls, retains them and then releases them all at the same time. Ideal for creating streamers of marbles and varying the rhythms!
Volcano: when the marble hits the volcano button, the block erupts and releases the 3 new marbles it contains in 3 different directions. This set is played with at least one Starter Set and can then be combined with all GraviTrax elements.
