There are a number of teachers on Teachers Pay Teachers who have created some great movement activities under various titles--Brain Breaks, Shake Breaks, Brain Gymnastics, etc. Check them out! You won't be disappointed.
Here's a video of one of my class' favorites--The Bazooka Bubblegum Song. My boys LOVED it as much as the girls! We always have fun moving along to this song. It's a great little workout too! ha!