Hundred Bead Abacus for Children The Gakken version has numbers written on it, making it easy to understand. I also liked that it stands on its own. While playing, children can practice "counting numbers" and comparing "the quantity of numbers." Above all, I felt it was effective for them to "see" and learn "numbers up to 100" by actually moving the beads. It supports the way of thinking about addition and subtraction, so it was helpful for learning numbers. This is an auction for the abacus itself only. There is a small scratch on the back. (See image 2) Please understand that this item is stored at home and has been inspected by an amateur. Please consider this before purchasing. If you have any questions, please feel free to comment.