I have heard that some churches operate a Day Care / Child Care Center during the week.
I do not know of any personally.
This new addition appears to apply only to "licensed" Child Care Centers:
(1) It is unlawful for a person to carry onto, or to possess on, licensed child care center premises, child care center-provided transportation, or areas of facilities while being used exclusively by a child care center:
Considering that language, it would seem the Sunday School type activities are exempt.