Large Metal Puzzle 4-Pack Mental Brainteaser #2

These are fun but they came tarnished and I'm worried they will start rusting soon. I was able to solve three of them relatively easily (15-45 mins each) and I'm not great at puzzles. The U shaped puzzle I haven't been able to crack, and I've tried it in my childhood as well. I bought this set because of that one.Overall I like the puzzles, though I wish more than one was difficult. It gets 2 stars because of the tarnishes.

Got these for the kids for Christmas - they loved them. Just wish there was a "solution" included somewhere - even a reference to a web page would be nice.

My teenage kids LOVED these in their stockings!

great focus tool, enjoyable