While it might be unlikely to happen in kids who snort smarties, it does happen, and it’s called nasal myiasis. A review of maggot infections in general:
“Myiasis”
Fabio Francesconia and Omar Lupi
Clin Microbiol Rev. 2012 January; 25(1): 79–105.
doi: 10.1128/CMR.00010-11
