I bought these for my daughter, she is really clever and loves a challenge. There are so many in the box the whole family can have a go. I tried out the 2x2 cube the easiest one of the whole set. I found out very quickly that it was harder than it looks, as I couldn't solve it. The cubes are great to play and relax with. The mechanism is smooth so it's comfortable and easy to turn, each puzzle is light but sturdy. There are eight different puzzles that come in their own presentation box, containing a leaflet with tips of how to solve it. There is also a book supplied called the secret tutorial of magic cubes, which teaches you how to solve each puzzle in more detail, even with the book they are still tricky to solve. This can be given as one big gift or can be separated out I am giving them out a couple at a time to my daughter as a reward for good behaviour.