I got one of these when I was in 9th grade and had a great time with it. What seems so simple (a two piece puzzle) is a real challenge to those who have not seen it before. I've been looking for this for a long time. The fact that you get two puzzles is great. My only disappointment is that the pieces are not as nicely made as the one I had as a kid. The plastic is a bit warped, which makes the final pyramid less stable -- slightly warped. The trick still works and I might not have noticed if I hadn't had a smoother one before. I still like and use it frequently. Good but cheap.

Purchased 5 boxes(2 in each box) of mini size for my trivia game on who could solve the puzzle the fastest. The winner got a Toblerone chocolate bar which is pyramid shaped, just to match the shape of the puzzle!The contestants were happy! Quick delivery. Even received a video of my order being packed by Santa Claus (since I purchased them around Christmas. Thanks Penguin