Here are some awesome classroom breaks:
https://www.weareteachers.com/brain-breaks-for-kids/
Check out my favorites on the website above:
8. Stir the Pot
12. Cross Body Exercises
15. Make Xs and Os
16. Energize in 5,4,3,2,1
21. Take a break to grove
34. Imaginary Ropes
36. Exercise your answer
37. Make a life size blender (the kids are the fruits, veggies, and other ingredients!)
46. 3,2,1 Blast off!
49. Balance Break
Here is an exercise game to play inside also:
First pick one exercise for each corner or wall of the room (for example, jumping jacks, mountain climbers, sit ups, and squats.)
Then choose one leader.
Kids can choose from these actions:
Standing
Sitting
Laying Down
Kneeling
The leader faces away from the group and takes a guess or picks one the of the 4 actions. Whoever is doing that action is out and goes to one of the four corners and completes the exercises. So if the leader says “sitting” all the kids who are sitting go to a corner and choose which exercise they wish to do. Continue until all the players are out. The last one left is the new leader and the game starts again with everyone back in the center.