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One thing that I always liked about Recent Toys is their ability to find new and original ideas, and transform them into superb puzzles. I have many puzzles from their extensive catalog, but finding a favorite would be a tremendously difficult task. As for the Brain Dice, I reckon it's one of the best from their entire catalog. That says a lot about it, no?

The first thing that captures your attention when you first look at the Brain Dice is its six dice, one in each side. The puzzle uses actual dice that you can see in any board game. Each side is surrounded by four arms, each with a rotating knob that shows three circles (each of the three circles can be either blank or black). You will only count the circles that are shown in black.

The goal of the puzzle is to first remove the dice from the frame and scramble them. Next, place the dice again, one by one, in the frame with the side that's facing you on the top. Finally, you need to rotate the four knobs in each side of the puzzle so that the sum of the black circles is equal to the number on the dice. It's simple to understand, challenging to solve and, most importantly, very addictive. And the best part? Whichever dice combination you have on the puzzle, there's always a solution, so you just need to keep trying until you solve it.

The difficulty of the puzzle is rated by the manufacturer as a level 4/5, and I completely agree. It's not frustratingly hard, but still challenging enough to keep you hooked and always coming for more. This is what makes the puzzle addicting, and of course, it's quite fun to play with.

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The Brain Dice is a superb puzzle and one that should not be missed by anyone remotely interested in puzzles. It's one of the best by Recent Toys in years. If you like a good challenge, this one is definitely for you.

Availability: You can find the Brain Dice on many puzzle stores. Brilliant Puzzles and Amazon are just two examples.