This is the basic set of "Scalino," a wooden educational toy made by Scalino of Switzerland. By building a "marble run" yourself, you can experience the principles of gravity and structure. It is popular as an educational toy that helps develop creativity and logical thinking. It's a toy where you combine building blocks and grooved rails with perforated blocks to freely create and play with a "marble run." You can create contraptions like those seen on the TV program "PythagoraSwitch." By trial and error while predicting the movement of the marbles, it is expected to foster creativity, spatial awareness, logical thinking, and a sense of accomplishment. It is mainly for children around 3-4 years old up to elementary school age, but it has a depth that adults can also enjoy. Marbles (3) are included. All the parts are as shown in the photos. The Scalino series has ended production by the manufacturer, and may be sold only while supplies last, so please consider purchasing if you are interested. There are no noticeable scratches or stains, but please understand that this is a used item and purchase accordingly.