Yes, your child can apply for a B1 visa. However, if you are granted a conditional green card and your child is under 21 and unmarried and you include your child on the petition, he or she can get a conditional green card with you.
Your child can apply for B-1 as long as he/she can demonstrate that child will return to his/her home country after U.S. visit.
Sure! You're rich and can afford to waste the money. The worst that can happen is that it gets refused.
When you ask a simple question, you will get a simple answer. If you provide greater detail then you can get a more informative answer.