GaiaOnline is a social network for teenagers. Members of Gaia Online, known as Gaians, receive a customizable avatar when they sign up. Users have the ability to customize their avatar in many ways, including skin tone, eye style and color, hair style and color, gender and attire. Numerous clothing items and accessories for avatars can be purchased from a range of NPC-run stores using the site currencies, Gaia Gold and Gaia Cash. Avatars appear next to posts in the forums and profile comments, and in Gaia Towns and other environments the avatar appears as a movable character that can travel from place to place, interacting with the environment (catching bugs, shaking trees and rocks for gold, digging for buried treasure, collecting trash and flowers etc.) and other users.