Brick Convention LEGO Fan Expo is a fan gathering for anyone who loves LEGO bricks, builds and brick-built creations. It's held at the Leonard E Merrell Center in Katy, just outside Houston, Texas. Expect a fun, creative atmosphere where brick lovers of all levels can geek out together. Whether you're a longtime collector or just love snapping together a fun build, this expo is a great way to spend a morning.