MY children did this one year at WDW and enjoyed it. It was a little crowded and although we were the second family in line waiting, they did ask my younger dd's age. At the time she was 3 months from her 4th BD and she is a little short. When they asked me, my dd was already sitting down with her sister and a bunch of other kids. So, I told them her birthday was next month, we had been waiting for 20 minutes and there was no sign saying what ages it was for nor did they annouce it. So, I lied a little, but they did let her stay. THere were a few other children that looked 3 and they were let in with no problem. My children were sitting near the entrance and there were no more seats for the children that were late coming in so I think they were trying to make room.