I agree with JessetheCowGirl: "basically, everything at MK except Splash, Big Thunder, Space Mountain, and Stitch"
Also, avoid any of the shows that require standing to watch them -- you won't be able to take the stroller in, the show probably won't interest the baby, and you'll get tired of holding him.
Also, plan on taking an afternoon break away from the parks, if you can. You and he will need it.
We're taking our little girl (will be 1 tomorrow!) and our 3 year old son in April. We last took our son when he was 2 and he loved it. Can't wait to see how my daughter enjoys herself!
EthansMom (and Molly's too)