kids would get super excited and watch the clock. when the time on the post-it came, i would pull one new toy for each of them from my stash, and that would keep them happy and busy for at least another hour. this whole process gave us a minimum of another two hours of peace and allowed us to make it to the next gas station stop or to the hotel we were staying at for the night. lifesaver!!
our kids ended up not needing to every time, but we always offered for them to get out and stretch each time we stopped for gas. one time i got them all 