I agree with HowlerKarma. My kid really dislikes pretty much all camps that are age based. They are all far far too easy. So that would not factor into the situation for us. If doing the grade skip helped put my kid into a music program that was very much desired, we would do it.
The one kind of campy/class thing that has worked is when they allow grades 1-4 (for example) grouped together and then we do that in grade 1 or maybe 2. Then there is enough difficulty of material to be of interest. Art classes seem to be less age based in our area too.
