S.H.
I did these tests for my school system for years. They don't tell you what is on the test because they don't want you prepping your child before hand. Basically they look at motor skills like skipping, jumping, throwing, catching, building with blocks. Basic knowledge such as name, address, colors, counting, etc. And Language Skills like rhyming, pronunciation of letters,
My "scientific" conclusion is this. Kids who are raised by single parents and have spent their lives in day care do very poorly. Kids who have been exclusively home with mom do OK. Kids who have been mostly home with mom but have some classroom experience like one year of preschool or sunday school and VBS, and have some experience with others such as spending time with Grandparents or other family members do the best.
One other thing they don't tell you. Your child can not score 100% only 99+%. In the 14 years that I did the test, I saw 3 kids with 99+% and I only had to turn down 5 kids.
Good luck and don't worry, this isn't the SAT