Can 4th grade boys grow mini mustaches?
my sister asked it because a boy in her class has a mustache thick enough to freak u out
That's just dirt, or he had chocolate milk with his lunch, or a little of both...
..It's possible.. but rare.
Even if they could it wouldn't be flattering.
your sister lies. unless that kid was held back for at least 10 years. was he? cuz if not...
That would be about age 10, right? Some kids do show early puberty signs & unusual growth spurts at this age. May be their genes, or it may be food additives/hormones in meat & milk. (Still being debated.)
If you hit puberty at 9 then sure...