Awesome gesture from Reggie Bush ... the ex-NFL star is making sure Nipsey Hussle's kids will be taken care of -- donating $10,000 to them and hoping to raise over $90k more.
Unclear how close Bush was to the late rapper ... but as a San Diego native and a former USC superstar -- it's clear the SoCal legend was able to touch Reggie in some way during his life.
So, Bush is giving back to Hussle in the wake of his tragic death last month .