http://www.actionforhealthykids.org/tools-for-schools/1252-brain-breaks-instant-recess-and-energizers
https://carriewisehart.com/2015/01/09/teachupsidedown-50-brain-breaks-to-engage-students-in-the-classroom/
http://brainbreaks.blogspot.com/
http://www.learningstationmusic.com/blog/2014/07/23/32-free-energizing-brain-breaks-vids-kids/