Carey, 46, said she wants to give her kids all the happiness in the world.
"The babies can't wait to get on the rides. They're super excited. I've been loving Disney forever - since I first came here - because when I was little, I didn't have the money to come to Disney so I had to make up for it over the years.
"I just want them to have everything that I never had, (but) now they want everything and more!," she said.
"My daughter loves to sing and Roc now loves to sing. They want to come up... And sing, especially Monroe. I don't want to be a stage mother like, 'Get on stage, sweetie, you got to sing'. But I don't want to keep her from it.