Did you watch Fantasia as a child? It was probably one of my first forays into the world of classical music. I'm sure it was for many children! What's so much fun to watch over again is the way Disney depicts each musical instrument bringing to mind different visuals - the little violin bows as dancing pieces of light in the clouds, the oboe as rolling hills, and the sun breaking through from the heavens as the orchestra comes to a crescendo.
There is definitely a connectivity between music and the fine arts and preschoolers love the opportunity to express how a piece makes them "see" in colour and design. Bach's "Tocata and Fugue" is a perfect piece to kick this off and colouring, painting or even sculpting to classical music each week is a great way to introduce your Little Musician to new composers while encouraging their creative expression. Here is my beast a couple of years back drawing to the William Tell overture. Still makes me laugh...