Pai Technology Cube-Tastic 3x3 Puzzle Cube with Free IOS/Android App Tutorial Brain Teaser Toy for Kids [Free APP tutorial] Our puzzle cube comes with a free APP tutorial, with which you can learn how to solve the cube step by step. It develops problem solving skills, hand-eye coordination and memory. Its a perfect brain teaser for your kids. [Stickerless and high quality] Our cube is different from any ordinary cube with stickers. Its made of food contact quality ABS, is non-toxic, and consists of 100% BPA-free materials. It's water-resistant and has a solid structure without stickers. [Easy Turning and Smooth Play] This puzzle cube is special , featuring rounded edges and extremely smooth rotation. Our lightweight, durable design was specifically crafted for small hands. It has a tactile, easy-grip surface. [Download the Free APP] Search Cube-tastic! to download the free APP in the Apple and Google Play stores. Its compatible with most IOS and Android devices. If you have any questions, please contact us anytime by email. We will help you solve the problem as soon as possible. [safety standards and awards] Meets ASTM F963, CPSIA, EN71& ROHS safety standards. Received multiple awards as shown in picture.