Quadrilla's The Roundabout is the perfect marble run for beginning builders. If your youngster likes building with blocks, playing with marbles or both, The Roundabout fulfills all those interests while introducing them to a fun new hobby of building marble runs! The Roundabout is designed as a marble run starter set. It's a perfect gift as is, but if kids desire more complex marble run designs, it can be combined seamlessly with Quadrilla's other marble run sets. All Quadrilla marble run sets are crafted with high quality birch and rubber wood for long-lasting marble racing fun! For ages four years and up.