Thank you for viewing. This is the BorneLund Quadrilla Twist & Rail Set. It includes building blocks, rails, marbles (50), instructions, the outer box, and a cloth bag for the marbles. Everything has been wiped down, but the blocks and rails show some stains and paint chipping that couldn't be removed. The cloth bag shows some dirt. The instructions have tears, folds, and stains, and have been repaired with tape. The outer box has tears, folds, and stains, but will be provided as is without repair, so please understand. This is a used item, so please refrain from purchasing if you are sensitive to such things. Thank you. 【Product Description】 A construction-style marble run that leads to programming thinking. The speed and direction of the marbles change infinitely depending on how you assemble it. It fosters children's trial and error and challenges. The various rails and blocks are full of surprising mechanisms. The blocks have different hole orientations depending on the color, such as those that act as tunnels for marbles to fall straight down from above, and those that release marbles from the side. Children quickly understand the functions of each color and play with them. The biggest feature is the red block, which has a mechanism inside that causes marbles to come out alternately from left to right when inserted from above. This allows you to create multiple goals. Also, using the included seesaw expands the play into a dynamic experience where marbles flow out all at once. You can freely assemble courses from simple to dynamic, and the speed and direction of the marbles change depending on your ideas, so children's questions and excitement never run out. Quadrilla, which hides physical theories such as gravity and friction, is full of charm that captivates not only children but also adults. Brand: BorneLund Product Name: Quadrilla Twist & Rail Target Age: 4 years old and up