This set includes 4 different metal brain teaser puzzles. Each puzzle has a couple of pieces that are tied together. It is your job to unlock and separate the pieces! These little logic toys are a fun way to keep your brain sharp. Ages 6+. Each steel puzzle is Interesting and Challenging, made up of 2 twisted wire shapes, where you manipulate the puzzle pieces until you can separate them to solve the puzzle. Instructions to solve the puzzles on the back of the package.