We took our twins when they were 23 months old. We also took our 17 and 7 year old daughters. That trip was not for the twins, we knew they would not appreciate it. It was for the girls, and we did not want them to have to wait to go because of the twins. The twins did not like the characters until the very last day, they were afraid of the dark rides, and the fireworks were too loud for them, but they still managed to have a good time. They just liked being outside in the stroller all day-keeping them in the shade was proably the hardest part. We were there in May, so it was fairly hot. I think taking them to Disney at that age was probably easier then taking them to the mall or someone else's un-childproofed house. Twins get so much attention just because they are twins, which can cause some resentment from the older kids, I would not want to add to that by cancelling a Disney trip because of the twins.