Very entertaining. Sadly 1 piece broke after 10 seconds (my mother was trying to solve it)
Good seller, good value for money, if you want better quality you will likely have to spend quite a bit more. Some of these do have some burrs, but never in a way that they can't be solved. This collection was assembled on my request. Easy: H, J, D Medium: C, A, I, G, E Hard K, B Very hard: L F is easy of you get it, seemingly impossible if you don't. My wife played with it for a minute, dropped it and it opened... Best looking: D, E, I and K Cheapest feeling: J, H, G Most solid feeling: D, E, I, A, L, B Not on review but I just really want to mention it: X is hardest (already had it from another store, also sold here) in the shape shown here, the commonly shown rectangle is very easy.