Ключевые слова: background, brain, business, challenge, conceptual, connect, creative, design, development, difficulty, education, flat, game, grey, group, hobby, idea, incomplete, intellectual, intelligence, iq, jigsaw, lay, learning, logic, logical, match, missing, object, pattern, piece, pieces, pile, play, problem, puzzle, rational, shape, solution, solve, solving, strategy, success, symbol, task, thinking, top, toy, view, white,