Includes: Peanut Butter and Jelly Hat WHAT IS ROBLOX? Roblox is the best place to Imagine with Friends. With the largest user-generated online gaming platform, and over 15 million games created by users, Roblox is the #1 gaming site for kids and teens (comScore). Every day, virtual explorers come to Roblox to create adventures, play games, role play, and learn with their friends in a family-friendly, immersive, 3D environment.