Like the best games, this is really simple to play (you could probably guess the rules without reading the instructions). It's worth repeating that batteries aren't necessary. They do enhance the game, however, as the 'jungle' sounds and T-Rex roar are really good, set the atmosphere, and have zero annoyance factor.
The fact that this is a dinosaur-based game means that it'll be a hit with almost every child. Go forth and purchase!