The special effect of going through the mirror and seeing Lumiere are worth going to the attraction at least once.
Everyone can have a part.I loved it, but only because my 3yo daughter was selected to play the Beast and got to have her own private dance with Belle!! She was so happy. It takes a lot of time and isn't as exciting if you don't get picked to play a part. . .but a lot of people do get picked, so there's a good chance you'll be asked to play a part.
As many times as we have been to Disney, we have never done this. Would a 3 yr old boy enjoy it at all? Or would we be better off doing something else?
Everyone can have a part.