GraviTrax Expansion Building Christmas Built-in flow control drain valve

Built-in flow control drain valve makes it easy to drain by attaching the valve to a garden hose (with included adapter) to drain away water

and discover music

With LED lights

Set containts small parts so it not suitable for children under 3 years old

Grimey and skeleton minifigures bring the action to life and encourage imaginative role play

GraviTrax Expansion Building Christmas Built-in flow control drain valveTake your marble runs to the next level with the GraviTrax Expansion Building Set. Designed to expand your existing GraviTrax system, it lets kids build bigger, more exciting track designs. Add new components to create faster runs, trickier paths, and more dynamic builds while experimenting with gravity, motion, and problem solving. Perfect for hands on STEM learning, this set encourages creativity, critical thinking, and endless construction fun.