A colorful abacus with 100 beads for learning numbers. - Brand: Silverback - Model: 100-bead abacus - Colors: Colorful (Green, Yellow, Purple, Blue, Red) - Size: Standard size (Specific dimensions unknown) - Target age: 3 years and up - Purchase price: 2728 yen Thank you for looking. I purchased this at Sanseido Bookstore. I bought it for home use because I used a 100-bead abacus in kindergarten, but I didn't use it much and have been storing it at home. There are some minor scratches, but I think it's in relatively good condition. Why not start early and teach numbers by the sound of the beads being moved?