User Friendly and Economical Design: Combines high performance designs with good value. This 6 by 6 magic speed cube is crafted with original and eco-friendly ABS material, reliable and comfortable in the hand, harmless to human and environment Durable Design: This 6x6 speed cube puzzle is true speed-cube, very slick and fast. Improved anti-pop technology and structure for extremely fast and excellent cornering. Each cube comes with pre-lubricated and finely adjusted by the manufacturer and it is ready to play when you get out of the gift box Built-in spring adjustment system can be used to adjust the overall elasticity of the 6x6 cube with a screwdriver to meet different needs Great Performance for Brain Teasers-Improve your concentrations, hand-eye combination, the spatial thinking, overall cognitive skills, increase IQ level and keep the mind sharp in old age Best Gift Set and Quality Guarantee. Perfect gift for all festivals, Birthday Christmas New Year Valentines Day Childrens day Easter Halloween Thanksgiving