In the UK we talk about over scheduling kids & effect on mental health etc.. My US relatives (East Coast based Connecticut & New York) kids are in numerous activities to make them "well rounded"..
Lacrosse, field hockey (girls), rowing, basketball, athletics, dance on top of two instruments at the bare minimum. Apparently this is the norm in middle class families where the aim is a top college. All this on top of high grades. The cost alone is staggering. Any U. S mumsnetters want to give an insight?