adj. In the sense that "old school" harkens back to the days of our youth when better rappers were spitting flyer rhymes, "old pre-school" refers to the influences that we or previous generations appreciated in the earlier points in our youth during or before pre-school, or kindergarten, or nursery, or whatever your cultural equivilent is.
As kids' tv shows go, The Herb Garden feat. Parsley The Lion is pretty old pre-school. He dates back to a time before homosexuals were even gay. All the best children were reared on shows like Parsley and The Magic Roundabout and Watch With Mother; None of this Mona The Vampire shit. What the hell is with that show anyway, it's just annoying retard kids inconveniencing everyone with their stupid paranoid delusions.