The math domino Plus & Minus is a fun game for learning arithmetic in the number range 20 recommend for 1st grade or from 6 years on. Many creations are possible with the dominoes, be it 2D or 3D. The Mathemino promotes learning with fun as a healthy entertainment at home or at school! The natural domino game is made of high-quality processed beechwood and a cotton bag to store all dominoes. The math game, like all our toys, exceeds the safety regulations according to DIN EN 71 & ASTM/CPSIA.