Trestle Tracks has the Official STEAM Stamp of Approval from the Toy Association, and it's great fun to build again and again and watch marbles roll down again and again. This set includes 1 catcher, 1 topper, 55 risers, 5 stainless steel marbles, 10 unique tracks, and a base grid for stability. It's compatible with the starter set, which we also carry. Made in China. Recommended for ages 8 and up. Not for children under 3.