hen Alex ­Binello was 13, he started playing games on a ­website called Roblox. He loved spending time with titles like Work at a Pizza Place and Down Hill Smash! so much that he was inspired to build ...

Roblox, a kids' content creation tool featuring goofy, Lego-looking characters and popular games about going to magic school, dressing up cute pets, and basically trying to become Naruto, is now worth ...