A free after-school program in North Hollywood is quickly filling up — and changing how teens learn. What we know: TUMO Los Angeles, which opened six months ago, is already at capacity. About 600 students attend each week, with a waitlist just as long. Inside, it doesn’t look like a school. No bells. No rows of desks. Instead, teens are learning animation, game design, filmmaking, robotics, and more — all at no cost.