Lewo Wooden Abacus Classic Math Educational Counting Toys with 100 Beads Set up with ten rows of ten beads each, with 5 different bright colors on each row Made out of a strong wood ,pretty durable .The paint on this is water based, safe for the kids and easy to clean Makes it so much easier to teach the kids addition and subtraction It is also good choice for portable travel toy ,birthday present,Christmas gift Approved ASTM and CE test .Size about 10.4*4.3*7 inches,1.3 pounds. Recommended age 3 up