As were Bose, Sony and JBL (for most entries).. but the selection is a tiny fraction of brands x models (no premium items in the list: B&W, B&O, M&C, Pioneer, Grado).. unless you count Bose or Sony.. they have tens of models each, though.
OP was asking about their American kids, so I assumed they wanted something that would just work and wouldn't get them laughed at by their peers. Thus Apple :P