Debi, you asked about his upset stomach.. I don't know if this applies to your son, but an upset stomach can be a side effect of over stimulating the chakra system. One therapy for the conditon is a deep breathung exercise.
You mentioned that you don't have an answer for him .Neither do I, but we try to help.
This next bit is not personal, but for me, the topic of “not knowing”is the topic of integrity and wisdom.
What we do know is so small a piece of such a vast body of knowledge, what we know is as nothing.
Saying “I don't know” is the only truly honest answer. It displays self honesty, and respect for the listener. …..develops an attitude of spiritual humility....which helps balance our ego.
To teach a child self reliance, have them ask lots of questions.To teach a child wisdom, teach them,"I don't know"
Its all good
love
Aubrey