The rules are a bit complicated. It says that persons age 10 - 12 can hunt under the mentorship program (arms reach rule, only one weapon in the group).
At the same time, they sell licenses (and require them) for those 10 - 12 year olds to be mentored. See the license listing on the DNR website. That is likely where your confusion ( and mine) comes from.
The actual "hunting license" is for those 12 and over. As I recall, even 12-14 year olds have to be within control ( sight and sound) of an adult mentor, but not the "within arms reach" rule and both hunter and mentor can have weapons.
There is no minimum age for taking the course.
I guess I have been out of the loop too long.
That being said, the written test is not exactly geared for 10 year-olds. Not saying your daughter wouldn't pass but I have been instructing for over 18 years and until the mentored hunts became a reality, I never had a student fail. When the mentored part came around dad thought it would be a good idea although not required, to take junior thru the class. All failures have been on the written exam. Field tests have been no issue. Not saying every 10 year-old has failed but there seems to be one in each class lately.
Best of luck with your daughter! Have fun!
Good luck Chuck