A Jack-in-the-box is a toy that consists of a small figure that pops out of a cylindrical box when the lid is opened, usually accompanied by a startling sound. Jack-in-the-boxes have been around for centuries, with the earliest known examples dating back to the 16th century. They are typically made of wood, metal, or plastic, and the figure inside is often a clown, jester, or other comical character. Jack-in-the-boxes are a popular toy for children, and they can also be used as a novelty item or decoration.
There are many different ways to make a Jack-in-the-box, but the basic principle is the same. A spring is attached to the bottom of the figure, and when the lid of the box is lifted, the spring is released, causing the figure to pop out. The spring can be made of metal, rubber, or another elastic material. The figure is usually made of a lightweight material, such as wood, plastic, or fabric.