Most kids, especially boys, have played Minecraft. The top reasons for its popularity are building structures and socializing with friends online. Minecraft players log on frequently - nearly half do so every week and a third of boys aged 8-11 log on daily. Popular characters include Creepers, the Ender Dragon, and Steve. Many kids already own Minecraft merchandise like the video game, books, t-shirts, and Lego sets. The document examines Minecraft's ecosystem and competitors.