Glass blowing is a technique used to shape molten glass into various forms. The process begins by heating silica sand, soda ash, and limestone in a furnace until they melt into a liquid. A glassblower then gathers a small amount of this molten glass on the end of a hollow pipe and blows air into it, creating a bubble. As the glass expands, the artist can manipulate it by rolling, swinging, or using tools to shape it further. This method allows for the creation of intricate designs and functional items, such as vases, bowls, and ornaments, showcasing the beauty and versatility of glass.