How to describe someone who is easily distracted?

Well, if the person is like me, then they can't pay attention very easily and it takes a lot of effort to pay attention for a short period of time. If they can't sit still at all (Like me) then they may have ADHD. Describing them? I would describe them not as weak minded, but definitely they have a vivid imagination. I've noticed that people who have trouble paying attention usually have a very vivid imagination.

Hope this helped!

~ The Mystery Helper