Sea Team Brain Teasers Metal Wire IQ Puzzles for Adult Children and Student, Box Package - Set of 20 EXCELLENT VALUE METAL PUZZLE SET - 20 different styles metal brain teasers in 1 box. Having 20 pieces spreads the difficulty throughout the kit providing a good amount of fun and challenge! CLASSIC EDUCATIONAL TOYS - It is such a great classic game that never gets old! Teasers rank from fairly simple to difficult. An amazing intelligence game to develop thinking and manipulative ability. Designed for children, teens, students and adults (Small parts. Not for children under 6 yrs). REDEFINE YOUR PASTIMES - Try this new strategy game in your spare time to save your eyes from harm of electronic product's display. Linked together these wire pieces and do come apart with the right strategy. Patience is a virtue. PREMIUM & ECO-FRIENDLY MATERIAL - The metal teasers are made of 70# HCS (High-Carbon Steel) to provide high strength and toughness properties; LEAD-FREE. Smooth edges avoid hand injuries and nickel plating finish is stainless. They will be bright as new after a long time use. INSTRUCTIONS & PORTABLE BAG INCLUDED - Metal teasers come with paper gift box and all of them are individually wrapped with opp bags. Non-woven bag is included for storing the teasers conveniently; Instructions are also included to explain the solution for each one.