If my parents took me to movies prior to the 5th or 6th grade, I don't remember them.
We lived on Minot AFB when I was that age and I was allowed to ride my bike to the base theater and watch movies.
I still remember scenes from The Battle of Britain and Grand Prix. I probably watched other movies at the base theater in those years but those are the two that stick out in my mind as memorable movies.
The engine revving scenes, the multiple image scenes and cars flying by the cameras in Grand Prix, especially on that big screen was just awesome.