Ya know, a lot of us fellow pooh sized folk can come on here and give you our experiences, but the problem is everyone is pooh sized in different areas and some things may not be as uncomfortable for me as they would be for you and vice versa. What I can tell you, is there are very few, if any, things that you CANNOT do. Disney tries to accommodate everyone and this is why they'll never have super huge thrill rides like other parks because those types of rides can't accommodate all body sizes. My best advice is to ask for your own row (7DMT), car (BTMRR & SM & SE), or to skip a seat next to you on rides like Dinosaur and Test Track, pull seat belts ALL THE WAY out before sitting, and ask for bench seating, if it's available; Some of the theater seats are *tight*. I know I can sit here and tell you not to worry, but since I understand, I know that you will anyway. What I can tell you is that I think you'll find out that it was all for nothing as Disney rides are VERY accommodating.