The Professor Puzzle Great Minds Einstein's Lab 6-Piece Metal & Wood Brain Teaser is a challenging puzzle inspired by the great mind of Albert Einstein. Made from a combination of metal and wood, this brain teaser features an irregular shape and a multicolor design, adding to the fun and complexity of the puzzle. Recommended for individuals aged 17 years and up, this unique puzzle will stimulate your problem-solving skills and keep you entertained for hours. Perfect for fans of science and those looking for a mentally stimulating activity.