Apple or PC?

Recently I've been working on a multimedia project for another class and it got me thinking about whether PCs or Apples are more practical and easy to use in the classroom and in general. I think Apples have a lot of great programs and seem to be extremely user friendly, but then again PCs have always been more popular as home computers. Which computer system is better to use with kids? My experience is that many schools actually do have Apples.