The Whirlpool marble run from Quadrilla whirls marbles around its many curves before letting marbles take a break at the bottom. Quadrilla's Whirlpool comes with an oversized spiral funnel for dizzying drops to a variety of speedy straightaways and crazy curves. This set can be combined seamlessly with Quadrilla's other marble run sets. Whirlpool is crafted with high quality birch and rubber wood for long-lasting dizzying marble fun! For ages four years and up.