The earliest piece of fine art I remember seeing is "Christina's World," by Andrew Wyeth. It had a strong effect on me and I thought about it often, even as a kid. The board game "Masterpiece" was full of real paintings to be bought and sold. All of this and being brought to the MFA as a child made a lasting impression. I'm glad I got to tell my mom before she passed away. You never know what a kid is going to remember and latch onto, so expose them to all sorts of good stuff. Something will stick.