They are soo fun! My school does this and it is awesome! Whenever we feel tired, we get to get up and do a brain break. There are all different things you can do. You can do Zumba, do dancing activities , dance to a  Kidzbop song, or dance to a song from a movie, like Let It Go. There are also indoor recess ones for 14 minutes, calming , and  yoga. I liked it so much that I did it at home! Whats also really cool is that you get to choose a character and as you keep on doing 10 brain breaks, your monster thing grows hair, muscles, ears, and suits of armor. This is how my character looks:

I  love GoNoodle!