Tin wind-up toys are small mechanical toys made from tinplate, a type of metal. They are powered by a wound-up spring mechanism that allows them to move when released. These toys often come in various shapes, such as animals, cars, and robots, and are popular among collectors and children alike. The design of tin wind-up toys often features colorful artwork and intricate details. They have been produced since the early 20th century and are considered nostalgic items today. Many people enjoy collecting these toys for their charm and the simple joy they bring when they spring to life with a gentle twist of the key.