These were used by children, so they are not in pristine condition. Also, some items may have name stickers or marks on them. How about using these to supplement your math set if you're missing some pieces? For items that can be sent via Yu-mail or Click Post, we will send as many as fit for 300 yen. (For items that cannot, we will discuss the shipping cost and sell them individually. Please comment with the items you are interested in, and we will discuss their condition, shipping method, and price.