Tinkerers of all ages gathered last weekend at SoCal Maker Con, a convention for "makers."
Makers are hobbyists, entrepreneurs and inventors. The "Maker Movement" is a subculture that started about 10 years ago with its own magazines, blogs and conventions that emphasize social learning through doing.
Makers turn common objects like PVC piping into motion controllers for their video games. They build just for the sake of building and learning how things work.