COUOMOxA Marble Run Building Blocks Classic Big STEM Toy Bricks Set Kids Race

Random Color Intellectual Development Challenge and AmusementMarble Run Building Blocks inspire creativity and curiosity Enhance imagination shape recognition and spacial three-dimensional thinking ability. DIY and building your unique set. Interactive 2 in 1 KitThe 50 47 pieces set in 2 separated plastic bag with separated instruction. Parents and kids can participate in together. Perfect set of 110 PCS which can make vary simple and complex tack models .Making it fit for kids of different ages. Manufactured by COUOMOXA. Steady Assemble and Smooth Marble RunThe blocks is smooth-hand feeling and can stay together smoothly. Safe Educational and Durable GiftThe Marble Runs Toy Blocks Made from High Quality ABS Material.Passed US ASTM 963 Safety CertificateAbsolutely Non Toxic!Perfect gifts for Both Boys and Girls Ages 3 and Up Upgrade Marble RunCover Variety Track BlocksCover 4 kinds of unique big fun track blocks+8 kinds of normal track blocks. Its an upgrade version of the 97 pieces set. 7 interesting models instruction included. Compatible with other similar size blocks.