Thank you for looking! This set includes a Cuboro (cuboro) Standard set, plus an additional set (I'm unsure which one), and I believe I've supplemented it with some similar blocks. I seem to have lost some pieces, and there are approximately 65 pieces in total. (I apologize for the vague memory. The pieces are mostly genuine Cuboro blocks, except for a few plain blocks.) I have wiped down all the blocks, and while I have tried to remove any child's markings, some marks remain. Please understand this when purchasing. There is no original box or instructions. I'll include two standard marbles that I had at home. As for the fun of marble rolling, there is no difference between genuine Cuboro and imitations. However, the precision and accuracy of the tunnels seem to be superior in the genuine Cuboro sets. Genuine sets also meet safety standards. I hope you will consider purchasing this set.