Are you looking for a professional, yet math mental calculation toy? Are you in search of a sturdy, trustworthy tool that can do multiple jobs at once? , ! Our professional math mental calculation toy must meet your needs. It is one of the for you. Features -Color:Assorted Color -Material:Plastic -Size:5.90X1.00X1.00cm/2.32X0.39X0.39in -Note:Each set contains . - are arranged randomly, and the you can calculate the sum of - numbers in one second. - Made of high-grade materials, and safe to use. stress and by simply playing with these toys. - Thousands of questions can be set, which is endlessly interesting. A kids and elderly, they will love it. - Fine workmanship and creative appearance ensure its popularity and practicality. - workmanship and good materials ensure a and perfect details. Package list: 2 x Sets of Domino Math Toys