Having done both, I find 3d a lot more intense than 2d XD (but 3d is the one I do because I can't draw >_>)
Doesn't mean I don't love a good 2d animation (or even cel shaded 3d but those are ticky to pull off well, usually when I see them I'm like x_x because I don't think they are).
Sounds like a cute movie, wonder if my kids will or have found it in their wanderings around Netflix.