Great idea, but, too small, too tedious, and too fragile. It is a challenge, which I like, but pieces are already breaking after connecting only 6 pieces. You need a mounted magnifying glass, and, you should wear rubber gloves, which makes it more difficult to assemble. With bare hands, tiny flakes of metal will stick to your fingers (do not rub your eyes). I would like to try another one, but, I don't know if I even want finish this one. No offense to the manufacturer, but, I hope improvements can be made.