The solution of crossword puzzles develops thinking, broadens the mind, promotes concentration, in general, what can I say – this is a useful pastime and at the same time enjoyable. It is better to train your brains from childhood, so we offer Crossword Kids for all kids – a special crossword puzzle. It is different from those that are adults and so interesting. Before you are three open books, on their pages are numbers in a chaotic order. You must find numbers that do not repeat. As soon as you find it, click on the number and the star will appear.