Build-and-Play Brain Games: With this all-in-one set, little ones build and play over 40 educational games for kids that boost critical thinking, early math, and fine motor skills! Let the brain games begin! Kids build critical thinking, problem solving, and other essential STEM skills as they turn MathLink Cubes into versatile pieces in games inspired by checkers, Tetris, and more. Designed for solo or headto-head play. Includes building frame, 15 double-sided activity cards, and 100 MathLink Cubes in 10 bright colors. Details: 8.5" x 8.5" tray size 40+ brain-boosting build-it yourself games and puzzles Develops critical thining and early math skills For ages 5 and up