We love the breakfast buffet at the Sheraton Safari! Lots of great choice, fresh squeezed orange juice, and a very reasonable price (I think it was $7.95when we were there last in 2006). Kids 10 and under eat free, but my kids were 10 &12 and they didn't charge us.
We stayed at the Sheraton Safari in '05 &'06, 2 nights each time. In 2005 we had the breakfast buffet the first day, and decided to try the Sizzler next door the next day. It was horrible!!!! We did not make that mistake the next year, and ate both days at the Sheraton. Very good selection and very fresh.
We had take out one night as well. We got back to the hotel around 9:00 or so and the kids wanted a snack, so we got them some chicken fingers. You can also get some snacks in the bar area. Enjoy!