properly, or the seat belts fit them properly. make sure older kids have your phone number memorized in case you get separated. also ask older kids to be a spotter. our twins have started playing with their chest clips in their car seat. we have given the goof the responsibility of letting us know if they move the chest clip out of the appropriate range since he sits behind them (they face him in their seats).
bring lots of snacks and a picnic blanket. usually a road trip involves a lot of driving. be sure to bring a picnic blanket and snacks and maybe a ball or something for kids to 