These are supposed to light up when you pull the tab out and the cat plays with them. One lit up initially, then after about 5 minutes, it stopped lighting up. We have 3 young adult cats (2 years old and 2 that are a year old). They love to play with toys, especially our Bombay. But as soon as the light went put, she went to a different toy.
Rating: [4 of 5 Stars!]