A simple game when you have a larger number of kids (camps programs, etc)!
Source: The Number Game | PHYSEDGAMES
Grade Level: K-6
Game Description: This warm-up or teambuilding game is simple, yet awesome! Students spread out in the playing area. Give maybe 20-30 seconds for them to just run around and around (or skip, hop, gallop, spin, etc). When the time is right, the teacher yells out a number (example, “SIX!”) and then the students must quickly form groups of 6 (or whatever number is called). Any players who didn’t make a group must complete 6 jumping jacks or exercise of choice. Then play again! Great to play along with music. Especially a great idea for large groups of students. Also, a good discussion about inclusion and personal/social feelings could be attached to this game.