Ключевые слова: abstract, activity, background, black, border, challenge, complex, complexity, concept, conundrum, design, education, entrance, exit, find, finish, flat, game, geometric, graphic, illustration, image, intricate, isolated, jigsaw, kids, labyrinth, leisure, line, maze, mix, object, play, quadrate, school, search, shape, solve, square, strategy, way, white, worksheet,