The Explorer STEM brain teaser puzzle set, 6 wooden mechanical puzzles, the perfect gift for kids that already solve the Rubik’s cube – Shriji Crafts Handmade wooden 6 IN 1 Puzzle Games Set 3D Puzzles IQ Brain teaser and mind challenge game for Teens and Adults. Size Set of 6 : – 7.5″ X 5.25″ X 2.0″ Weight: 580 Grams” The Explorer STEM brain teaser puzzle set comes with 6 wooden mind blowing mechanical puzzles. We’ve selected six of our most popular puzzles of varying difficulty levels and puzzle types for this unique gift set. If you get too frustrated with one puzzle just pick up another! With six puzzles to choose from, this gift set provides months of entertainment for new and experienced puzzlers to build their skill level. This special collection puzzle gift set is the perfect way to keep children aged 10 and up intellectually stimulated and entertained after school, over summer vacation, or even on a long trip. This collection also makes a handsome and unique gift for adults, perfect for that family member, friend, or colleague that’s always hard to shop for. Adults will be challenged by these puzzles, again and again, making this box set a great desk toy or coffee table game to share with colleagues and friends. FOR BULK – PLEASE SEND EMAIL.