we took our DGD at 17 months. It was so much fun!
But, she is a active little one and we didn't do anything that took sitting for too long, so no shows.
She is also very vocal, so meals at sit downs could go wrong very fast.

She had a great time though and loved! the characters.
After a couple of days she knew what was going on and pushed her stroller to the door. Brought everyone their bags and shoes.....even though it was 6 am and she was running around in a diaper.....she was ready to go!