We have gone when our kids were 2, 2 and 4, again when they were 3,3 and 5 and this trip they will be 5,5, 7 and 7 months. We have never done autographs and my kids have never asked. We never have told them it was an option. I find character meet and greets stressful because at times we have been in line and there were 3-4 people left to go and we then get informed the characters are leaving. If my kids had their hearts set on an autograph that would have been horrible.
-Amy