This is the basic Scalino set (48 pieces, 4 marbles) of building blocks, also known as the "Ball Track." Using regular blocks, rail-type blocks, and blocks with curved grooves inside, you can create various fun marble tracks and play with them. It's also used in Pythagoras Switch! Cuboro, which Sota Fujii played with, is very difficult because it uses the "inside" paths of cubes, but Scalino is intuitive and easy for young children to enjoy. *Please note that the marbles are slightly smaller than standard ones. Recommended age is 3 years and up. The blocks are almost like new, and the instruction manual (similar to an introduction) that came with the purchase is also included. Please be aware that only the transparent sheet that serves as the lid of the box has some fine scratches and cloudiness. There are no pets or smokers, but please understand that this is stored by a private individual. Instant purchase welcome ◎ If you use Eco-Mercari delivery, we will offer a discount, so please comment before purchasing. - Brand: Scalino - Material: Wood - Type: Building Blocks - Instruction Manual: Included Thank you very much.