We have been there. I tried (but did not succeed) to have the student included in advanced classes (regular, school year or summertime). We have found that, in general, it might just not be feasible for these children to be accommodated to match their level. We are still working on this ourselves.
If your child can get help now from your school district, could you somehow work these special projects into an individualized educational plan?
It seems those types of projects happen at the middle school level. In elementary school, one project might go over an entire year working slowly as a whole group. If your child is social, it will be mainly a social experience.
The pace can be mind-numbing. Maybe another family has been more successful.
You are doing all of the right things, but, yes, there is no time to do all of the other things that have to get done to keep the family / household-as-a-whole running. So, we just explained to everyone that our child loved special projects and that we were being commandeered to work for this child. The good news is you will likely always have a job position at your child's future mega-corporation. I find humor helps me the most. Don't expect anyone in your near vicinity to really understand.
If you have any DIY projects on your family list, engage your child to be the designer, architect, mathematician, etc. It is not too soon, these kids are ready to GO, GO, GO!
