I should have been a lot more specific. You may be able to buy a 2 tee in one from a baseball/softball equipment magazine. But in case you can not get one you set the two tees one in front of the other. The first tee that is closes to the batter should be a ball lower than the tee farthest from batter. Put the ball on the tee that is set up normal size. The goal is to swing the bat and go over the first tee hit and hit the ball on the 2nd. If you hit the first tee that means your are either dipping your back should or you are dopping the bat head. Once the you are hitting the ball and not hitting the back tee you have level or even swing.
There is also an little more advanced way of using the 2 tee system. Put both tees at the same height and put a ball on both. If you swing is even the first ball will hit the 2nd and the both will go straight. If there is a drop of the bat head or dip of the shoulder you may not hit the first ball or you may hit it but not second one.
I would use the tee, then do some front toss and I would use the same size ball she is playing with now with both. At her age it is very important to keep it simple and do not mix in to much detail. You know what you want her to do but talk to her in simple terms. Another way to keep her attention is come up with games that have goals and challenge her. Good luck
There is also an little more advanced way of using the 2 tee system. Put both tees at the same height and put a ball on both. If you swing is even the first ball will hit the 2nd and the both will go straight. If there is a drop of the bat head or dip of the shoulder you may not hit the first ball or you may hit it but not second one.
I would use the tee, then do some front toss and I would use the same size ball she is playing with now with both. At her age it is very important to keep it simple and do not mix in to much detail. You know what you want her to do but talk to her in simple terms. Another way to keep her attention is come up with games that have goals and challenge her. Good luck