In a dark room, a large illuminated balanced-arm desk lamp named Luxo sees a small yellow ball with a blue stripe and a red star on the front rolling up to him. He eyes the ball curiously, and pushes it away, but the ball comes back to him. He pushes it away again, but it rolls past him as Luxo Jr., a smaller desk lamp, hops over and plays with the ball. Luxo Jr. then balances himself on top of the ball and bounces on it excessively, causing it to deflate. Luxo Jr. flips the deflated ball onto its side and looks up at Luxo, who gently admonishes his son. Luxo Jr. then hops offscreen in shame, but is later seen playing with a beach ball. Luxo looks at the camera, then shakes his head in embarrassment.