Tom poses an interesting question:
My 4-year-old daughter is great at getting into her booster seat in the car and *almost* buckling herself in. The problem is that she can't reach the female part of the seatbelt buckle and hold it while she inserts the male end — while sitting in the booster seat it is too difficult to get two hands down there. She lines things up with one hand but when she tries to push the male part of the buckle in, the female part just moves away. She gets it 50% of the time. It's easy for me to reach back and tug to ensure that it is secure, but I would love to know of some hack to hold the female end so it doesn't move or some other method of making the process easier.