www.Cogito.org has a really really comprehensive list of summer programs. my oldest S has done 3 summer programs through talent searches and I was looking for something different--there were research opportunities, scholarship programs, all kinds of things. I could have spent weeks looking through, but think I found one that sounds perfect for him. The down side is without talent search, we have to do application, recommendations, transcripts, essays. But he's willing to do it.

two other kids are doing talent search institutes plus some day camps

I'd like to do the hiking/journaling & day trips too with the kids. time seems to fly in summer (can't imagine the year round school schedule). should start looking at colleges with oldest DS, too.