SPRING DESIGN -- Well designed with adjustable tightness for smooth cornering and easy turning, flexible and stable.
BRAIN TEASERS -- Irregular 3d cube puzzle, more changeful and more challenging. Helping to improve spatial thinking, it is a good way to train your brain, and a good educational toy for kids and teenagers.
PERFECT GIFT -- A very good choice of gift for everyone –friends, kids, adults, beginners and professionals –on the occasions of birthday, Christmas, Halloween and other holidays.
RECYCLABLE MATERIAL -- Made of durable ABS material and PVC sticker, harmless and environmentally friendly.
100% SATISFACTION GUARANTEE -- We provide Free Replacement or Full Refund for any issue of quality. Please feel free to contact us with any questions you have.