My daughter loves to watch Netflix on the iPad. This is the reason you can't find any recommendations on my account other than horse movies. She is still very small, there isn't a set of headphone in the house that fit her little head, and the internal speaker "sucks" according to her. What I and anyone else that thinks that the internal speaker leaves a lot to be desired needs is the new Logitech Tablet Speaker for iPad.
The speaker is an interesting little thing that is about as wide as the iPad in portrait mode. It connects to the iPad via the 3.5mm headphone port and then plays much better audio than the iPad's own speaker. The Logitech speaker is powered by an internal rechargeable battery good for up to eight hours of use per charge. It also comes with its own soft bag for portability.
One of the cool features about the speaker is that it has clips on the top to clip onto the iPad. The speaker can also be used as a stand to prop the iPad up when you are watching your favorite video or working. The Tablet Speaker for iPad will work with any 3.5mm headphone port device, but the clips may not fit all devices. You can pre-order the speaker now for $49.99.