This spinning top with led light is gyro activated, so the led lights fitted to it turn on as soon as the top starts spinning. Though it can be played with at any time and any place, for best effects, it should be spun in a dark room. The lights create a magical ambience. There's accompanying music with the lights in this spinning top for 3 year old kids. So it engages the child in more ways than one. It comes with preinstalled batteries, which are easily replaceable once they drain out. A best gift for you children. Kids will make a lot fun from this amazing gyroscope.