We’ve all been there — trying desperately to keep our kids quiet and behaved in a waiting room, on an airplane, on a train, or while running errands — and when choosing an engrossing activity to distract your children at these times, nothing is better than the iPhone. But how do you find good kid-friendly iPhone apps that will educate and entertain your child? Check out five of our favorites. From learning apps that help kids master letters, phonics and more to simple and super-addicting games, we found amazing apps that will keep your kids busy on-the-go, saving you from all-out melodramatic mayhem.