For adults, it is a good toy to relieve stress. Magic puzzle made of ABS is the most classic and popular game toy in the world. Figuring out a solution for magic puzzle could teach kids to work hard at solving complex problems and foster people's sense of space and enhance a child's memory. So a speed cube is the best gift idea for birthday or Christmas. Size: 2.5 " x 2.5 " x 2.5 ".