Leads on last minute research or internships for a rising college sophomore?

Thanks. Any suggestions for great online summer certificate programs? Presumably CS, physics or math related? He hasn’t done any CS in college but did get a 5 (self-studied) on the AP Comp Sci A in HS and take the school’s post-AP Adv Algorithms and Data Structure course (which is why he did the self-study AP to qualify for since he didn’t have room for the prior courses on his schedule).