Exciting brain teaser puzzles for kids and adults to enjoy, this disentanglement puzzle provides for hours of entertainment, included in this assortment are 9 different designs. Metal puzzle brain teasers originate from Chinese culture and were designed to aid with concentration and focus. Puzzles also help develop creative thinking, problem solving, improve your IQ, and more. These metal brain teasers provide for a great challenge with wire pieces twisted together. To unlock, you'll need to maneuver the pieces until you will be able to separate them. Durable brain teaser puzzle set for all occasions, these are perfect to hand out for birthday parties, party favors, classroom rewards, educational prizes, gifts, stocking stuffer, Easter egg filler, and much more.