Yes there are, there is Suess Landing at IOA, pretty much totally for young children, its like living in a Dr. Suess book, there is going to be the re-tooled Flying Unicorn, which will now be part of Harry Potter's world, which is a kiddie coaster. There is Pteradon flyers at Jurassic Park which a parent can ride with a younger child. THere is also camp Jurassic which is a really cool kind of play ground area in JP.
Universal has a lot, ET, (not sure about 2 year old for some of these) there is Shrek 4-D great show, a whole kids area, Simpsons, and several other shows and things.