Here are a few links for some movement break options:
Most People is a great story about how most people are good people.
The Cool Bean is a great story about how it is cool to be kind!
Stickley Sticks To It is all about how having a growth mindset will get you far!
Cake and I Scream is about the importance of being a good friend and not being bossy.
The Impatient Caterpillar is a great story about patience!