Disney world in 2 days ?

Me and my family(2 adults, a 7 and 16 yrs old girls) are going to visit Disney World for the first time. We know that we def. will go to magic kingdom on the first day, and Island of adventure on the last day. On the second day we're not sure which one to choose between Animal Kingdom, EPCOT or hollywood. Which one do you think is better for us ? We also planned to visit downtown disney after visiting one of this park on the second day. FYI, we're not getting park hopper and we're not staying at a disney hotels. Oh and which one is better, Planet Hollywood or Rainforest restaurant at downtown disney ? thanks.