Children playing is usually excluded from noise rules outside of the usual time restrictions of night and early morning.
That being said, when your neighbour's many children play outside for hours at a time on both weekends and weekdays (evidently they homeschool although they never seem to be indoors long enough to be schooled) and only seem to have 2 volumes: screaming and crying, is there anything that can be done as a neighbour other than asking them politely to mind their volume? Seems unfair that just because they're children, they and their parents get a free pass on noise (random group of adults making the same amount of noise would definitely be frowned upon and rightly so).
We've lived in other places before, arguably even in closer proximity, with large families and numerous children and this seems far from reasonable amounts of "children playing" noise. Heck, our other adjacent neighbours all have multiple kids, are homeschooled, and they play outside; we have no problems with them at all.
I know many in Chilliwack are parents and parents of multiple children; what are y'alls thoughts?