Here is a presentation with 20 different brain break ideas. You can put up the presentation for your students to choose or you can choose for them. Each brain break is listed under a category: get up, get up and move, act it out, games, or tricks. Under each category there are times. For each activity there are instructions or manipulations to help the activity go smoothly in class.
It is originally a google presentation, so if you want the fonts, just send me a message with your gmail account and I will share it with you.