This was a great toy and a great gift for a dinosaur loving 3 year old grandson. I had to scratch the battery contacts a bit with a pocket knife, which is not uncommon, but one day it worked exactly as advertised, roaring wildly, glowing brightly, roaring and running on its own like a champ. Grandson liked it very much! Didn't like the remote control because it's not usable and there's no volume control, but it works well.