Baybee Wooden Maths Calculating box / Mathematics Practice Board for Kids / Number Puzzles Educational Toy Set safety 1st - all our products are en 71 certified which is most stringent certification defined by european standards for safety of babies and toddler. Every minor point is considered to give safest product to your baby A study conducted in 2015 at department of human development at cornell university determines that young minds respond and learn fast and more efficiently with bright colors simultaneously corresponding with letters and numbers. This study used models virtually identical to our model. now, it's available to you and your developing child. Wooden "calculator" helps teach math skills,patterning and color recognition, rods can help kids understand math better. Make learning fun, enrich the child imagination, stimulate children's logical thinking, improve children hand eye coordination and learning ability. Wooden material, Eco-friendly, safe and healthy; Non-toxic, tasteless and smooth.