Oh ho, and yet I, a parent, can still put my thumb on the streaming scale. My daughter right now is watching old Nick Jr. Cartoons, playing Mario 64 (as well as a 2yo anyway), and the untitled goose game.
She also watched old seasons of Curb Your Enthusiasm with me since I had it running, though I probably don't want her to adopt Larry David vibes...
Goose game is a hit with mine as well. I haven't introduced 3d games yet, but Super Mario World and Donkey Kong Country seem to be favorites right now.
I thought about 2D vs 3D, and it just seemed 3D made more sense for her. Granted she mostly just runs Mario to butterflies and then let's him nap. She's not really goal oriented yet.
As for goose... She sees it, then she runs around the house honking and flapping her wings. This is how you raise a hell raiser lol