My parents were not really cinema vistors but one of my first cinema memories is that I saw WATERSHIP DOWN with them.
Wow! I probably would have been traumatised by this one. My son saw it with twelve and said himself, this wasn’t a kids movie.
I think, my first movie experience might have been Bambi with 2 or 3. I just remember some rough images and noises from it but nothing about the story. Haven’t watched it since.