A platform rocking chair is a type of rocking chair that has a large seat and a high back. It is usually made from wood, and the arms and legs are often curved. The platform rocking chair was first introduced in the United States in the early 1800s. It became popular because it was more comfortable than other types of rocking chairs at the time. Today, platform rocking chairs are still made from wood, but they can also be found in plastic and metal.