This ROKR Perpetual Calendar Mechanical Gears Puzzle model is a great addition to any puzzle or toy collection. With 52 pieces, this clock-themed puzzle is made of wood and comes with English instructions for easy assembly. It is suitable for individuals aged 12-16 years and 17 years and above, making it a unisex gift option. Please note that this puzzle contains small parts that are not suitable for children under 3 years old. The puzzle is packaged in a multi-coloured box with a size of 320*235*50mm and was manufactured in China. Get yourself or your loved ones this amazing puzzle and enjoy hours of fun and brain exercise.