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.