If you go ask the universities, they will tell you they look far beyond the GPA and test scores. In Stanford Freshman class opening ceremoney, the vice provost said: we admitted you because who you are and we believe in you to become who you want to be. The school plays the role of providng support and environment for you. (something like that).
Bottomline, getting good grades etc is good but that should not be your goal. Let your child develop their own uniqueness. You never know, from T & T he might learn a lot more while having fun. It is what they do outside the classroom that sets the best apart from the very good.