The key to a successful road trip is to keep everyone entertained, especially when kids are involved. The days of singing "99 Bottles of Beer on the Wall" to keep everyone alert are over. Many minivans and SUVs come with built-in DVD players. But if yours doesn't, you can buy one with two monitors that attach to the headrests. And don't forget to pack the movies.
Handheld electronic games are also useful for passing the time, as are books on CD. If you're tight on space, consider loading up an iPad with movies, books and games. Chances are everyone will want to get their hands on this versatile gadget, which even has maps among its many apps.