This is a German-made wooden "marble run puzzle." My child used it when they were around 5 years old. It became very popular at the time because it was reported that Sota Fujii (a famous Japanese shogi player) was playing with wooden 3D puzzles (although I don't know if it was the same one as this). There are no noticeable scratches or stains, but the outer cardboard box has deteriorated and was held together with tape, so there are tape marks and some tears. A single sheet of paper with a model for building the puzzle is included, and my child used it as a reference. There were pencil markings on the reference paper, which I erased with an eraser, but faint traces remain. It was purchased at Bornelund, and it seems that similar items are not available now. My daughter is 11 years old, so I believe this item is about 6 years old. I would appreciate it if those who understand that this was a toy my child played with would consider purchasing it. Keywords: Educational toy, 3D puzzle, Kugelbahn, German-made, kindergarten, age 3 and up, gift, boys, girls