We had a blast taking our less than 2 year olds. However, my ds was much more difficult to handle waiting in even the smallest of lines and sitting in a stroller. He loves to run and move...and being held resulting in many kicks, punches, and head butts (I thought he broke my nose on IASW). He did have a lot of fun, but it wasn't as much fun for the adults. My dd, on the other hand, was really easy to handle at 21 months. She was in awe of everything and very well behaved.