This is a set of 51 blocks. I believe they are from BorneLund. It's a toy where you assemble blocks with holes and grooves, drop marbles into the holes at the top, and watch them roll down. You design and build the course yourself, which seems to be beneficial for brain development. My child used these to play with, but they've outgrown them, so I'm putting them up for sale. The marbles are not the ones that came with the set. There is no box. There are some scratches and dirt, but I think they are still in good condition. Please feel free to comment if you have any questions or requests. I will use recycled boxes for packaging.