I've been to Disney World the past 2 years while my daughter was 3 and 4 years old. However, when we go in Nov 2013, my son will be 1 1/2. So i'm wondering what the riding situation is at that age. Is he ok to ride with an adult on any ride without a height restriction (within reason)? For example, can he sit next to me/on my lap on Winnie The Pooh, Dumbo, The Seas With Nemo, Spaceship Earth, Peter Pan's Flight, etc, etc, etc?