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Continue on the road to becoming a SpaceRail master! This fourth level intermediate set features multiple paths for your marble to travel including a vertical corkscrew, consecutive loops, a seesaw drop, and a screw conveyor to challenge your intellect. Watch as the metal balls dip and dive through the assembled track. Perfect for physics classrooms, expert Lego builders, and anyone that loves a challenge in thinking and building. This Beginner Level Spacerail is a build it yourself Marble Rollercoaster. Build your Spacerail with the pre written instructions, or design your own! With endless possibilities and hours of fun, this Marble Rollercoaster will spark the minds of young children and even matured adults. Create fun filled family memories, and build a Spacerail together.