It always bothered me that they *needed* the wands to do magic. In the first film/book, before Harry went to Hogwarts, there were instances of him using magic unintentionally without the use of a wand (such as turning his teacher's wig blue).

Why do they need them? Are there any that don't need them to intentionally use magic, if so, why?

**Clarification edit:** I mean are there any that are able to do magic **well** without the use of a wand?