Sure you have to pickup the one that is suitable for young kids. I always get dress circle since they are short. Dress circle is on the 2nd floor. if you are lucky, you are able to get the front roll in the dress circle section and there will be nobody block your little princess or prince.
Definately encourage you to take your child. My daugher's first theater experience is Phantom of the Opera.. and i was worried that she will not be enjoying it since it is a love story happened in France. But i have to say that it is amazing how she understands and what the impression she got from her first ....