D ETERNAL Kids Cube Solving Guide Book - Step-by-Step Speed Cube Puzzle Tutorial for Beginners | Perfect for Learning, Gifts & Brain Training

Special Feature: Give your child more playtime and reduce their addiction to mobile gaming and excessive screen-time; Helps in enhancing concentration, analytical and problem solving skills,memory and mind;Builds better hand-eye coordination,patience in solving real life problems and handling anxiety; It's a brain exercise for all ages to help increase the intelligence of kids, release work pressure of the adults, to help prevent a decline in memory of the elderly