A few other things you can look into: Aurora University has a Young Scholars program. College of DuPage has a Talent Search program. Fermi Lab sometimes runs programs (the Open Houses are really fun, too - I think they have those twice a year, and just had one recently). IMSA has camps in Aurora (on their campus) and as the other poster mentioned, there are CTD at North Central College. Actually, we only live a few minutes from there (and our dd20 is a senior living in the townhomes on campus). We've never done the Saturday enrichment because of sports... and we tried to get dd to be a student aid, but apparently, getting up early (Naperville has only morning classes) was not in her plans! The local gifted program PTA just had a summer fair, but I didn't make it. Sometimes the library has enrichment programs - not run by the library, but there have been a few gifted programs that lease space at the Naperville libraries for their stuff. Keep an occasional eye of the IAGC website as well (Illinois Association for Gifted Children) and they can help lead you.
Good luck
