The laws vary by state. For many states, kids under 14 will have to hunt side by side with a parent or other adult. For example in WI, kids down to age 10 can legally gun hunt, but must be within an "arms reach" of the adult.
Yes, the age is 10 now in Michigan, a change with which I fully agree. You still have to hunt with an adult until age 17. The adult has to be close enough to talk to you without any electronic aids.
The adult doesn't have to be a parent.