I do believe I can finally spare my back by not crawling inside of the mini-van to get to the 3rd row in order to buckle my 3 year old in. Yesterday I asked him to buckle himself in and so he tried, no so successfully, but I was there to give him pointers. This morning when I drove him to school, he was able to buckle himself without my help! Yipeee! Of course I need to check to make sure the seat belt isn't over the arm rest of the booster and that it isn't twisted.
Life has gotten just a tad bit easier. :-)