Rounding up

Alisha has been begging me to measure her at least twice a week for the past 6 months.  She has been waiting until she hit 4'9".  That's the height she needed to be to not need a booster seat in the car.  The law here used to be 6 years old or 60 lbs didn't need a booster, but was just changed to be 8 years old or 4'9".  I've always felt that was safest anyway.  The smallest adult they make the seat belts for is 4'9".  So anything shorter than that just doesn't fit the kids right.  So Alisha just turned 8, and was disappointed that she wasn't quite 4'9".  She would even stretch and stand really straight and tall to try to make it.  Yesterday, we were getting in the car, and I told her to sit without the booster so I could see where the seat belt fit on her.  She again sat up really straight and tall, and the seat belt was fine across her shoulder, where it should be.  I told her she was okay, and she did a fist pump and said, "YES!!"  When we got home, I measured her, and found she was 4'8 1/2".  She told that to Chris, and he said, "So we're rounding up?"  Sure, I guess we are.