Here's a chart:
Animal Kingdom Dinosaur 40"
Epcot Wonders of Life / Body Wars 40"
MGM Studios Rock 'n' Roller Coaster Starring Aerosmith 48"
Blizzard Beach Summit Plummet 48"
Blizzard Beach Chairlift 32"
Magic Kingdom Barnstormer at Goofy's Wiseacres Farm 35"
MGM Studios The Twilight Zone Tower of Terror 40"
Animal Kingdom Primeval Whirl 48"
Blizzard Beach Downhill Double Dipper 48"
DisneyQuest Mighty Ducks Pinball Slam 48"
Epcot Body Wars 40"
Magic Kingdom Tomorrowland Indy Speedway 52"
MGM Studios Star Tours 40"
Typhoon Lagoon Bay Slide 52"
Animal Kingdom Kali River Rapids 38"
DisneyQuest Buzz Lightyear's AstroBlaster 51"
DisneyQuest Cyberspace Mountain 51"
Epcot Test Track 40"
Magic Kingdom Space Mountain 44"
Magic Kingdom Stitch's Great Escape 40"
Typhoon Lagoon Humunga Kowabunga 48"
Animal Kingdom Expedition Everest 44"
Epcot Soarin' 40""
Magic Kingdom Splash Mountain 40"
Magic Kingdom Big Thunder Mountain Railroad 40"
Even if he can't ride these,y'all still can:
http://www.wdwinfo.com/childswap.htm
Have a wonderful trip! BTW,my DD was just a little older on her first trip and she loved everything!