In a dark room, a large illuminated balanced-arm desk lamp named Luxo Sr. 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. The ball comes back to him, but this time, it rolls past him. A smaller desk lamp, named Luxo Jr., hops over and continues playing with the ball. Luxo Jr. then balances himself on top of the ball, causing it to deflate. Luxo Jr. flips the deflated ball onto its side and looks up at Luxo Sr. who gently admonishes his son. Luxo Jr. then hops off-screen and is later seen playing with his beach ball. Luxo Sr. looks at the camera, then shakes his head in embarrassment.