Hi Phyllis!
Yes indeed there are some meet and greet with some princes who can talk, but they are a little bit more difficult to find since they are outnumbered by other classic Disney cartoon characters and princesses.
We were just at WDW this last week, and I did catch a glimpse of Aladdin and Jasmine at Morocco at Epcot. Prince Caspian is meeting guests near Toy Story Midway Mania at Disney's Hollywood Studios. We've also in the past seen and met Prince Charming, Peter Pan, General Shang, and Jack Sparrow (he's a prince to me!). I don't think I've seen Eric other than in the parades, though.
When you arrive in the parks, make sure and get a Times Guide & New Information flyer. It includes details about character greeting times as well as park hours, restaurant hours, attraction hours, show times, and parades/fireworks times.
Best of luck, but I don't think you'll need any! Kara