A. Revolutionary Open-Closed Sign Board-- Just rotate the handle, and open and closed switch in a magical way. Combines interesting typographic tricks and a gear mechanism. B. Material-- The open and closed gear signs are made of selected wood. Many parts are carefully calculated and assembled to form unique shapes. Cut and edged in a special way without sharp spikes and brittleness. C. Convenient and Clever Design-- The Open Closed Sign Just turn the handle, "Open" and "Close" will magically be interchanged. Not only fun but practical. It's easy to handle and sturdy enough for everyday use. Standing and hanging, two types are available to suit your purpose. It's easy to handle and sturdy enough to withstand everyday use. D. Combining Art and Practicality, perfect gift-- The switch sign is also a art that adults and children can enjoy it. The beauty of its structure will impress you. There is a mysterious satisfaction in just watching it move. It's also a great educational toy for kids that allows children to learn how gears work while having fun.