Breathing fire is AMAZING. You add water from the top (it's very easy and they give you a small plastic bottle. My five year old did it with no problem. The T-Rex actually breathes steam and then the red light makes it so cool when it roars. You need 3 AA batteries for your T-Rex and 3 AA batteries for the T-Rex remote control 5 eggs are included Now I was frustrated that you can't put all the eggs in or they start to pop out When the T-Rex - Rex runs and roars, the eggs fall down a bit anticlimactic, but the children liked to look through the eggs, but found that the children looked like stegosaurus children and not T-Rex children.Children are smart!A dinosaur like this I felt this one was a little bit worse I would have preferred to charge it up instead of changing batteries I think the egg dropper needs a little improvement as well the roar and fire are AMAZING and for most Children this will be a home toy Great gift Easy to use.