4 Metal Disentanglement Puzzles ~ Physical Brain Teasers ~ Steel ~ Difficulty Level 1 - Beginner 4 Disentanglement Puzzles ~ 2 Puzzles in each, you disentangle it, then you have to put it back together! Excellent for Beginners & Pros Collection! Strong, Unbendable, Steel ~ These will last until you lose a piece ~ Fantastic items to Collect! Difficulty level varies, depending on experience ~ Beware....sometimes your child will figure it out before you do! (Great Confidence builder, non-artificial) Puzzles are not just for entertainment & fun. They are excellent educational tools for creative thinking, process of elimination, problem solving, & strategizing. Puzzles have the principles of mathematics, logic, & reason strongly built into their structure! They inspire intellectual creativity & are also perhaps the most important human form of leisure activity known to humans - recreation in the pure sense of the word!