I really like the idea of introducing the concept of loops with a dance. I also might pull up some school appropriate gifs to show my students. Being in the library, I might pull a book that has a lot of repetition to read, as well.
In PE, students do a unit on group dance. Students learn the electric slide and cupid shuffle. I think it would be a great segue into teaching loops.
The students of primary education use the loops through a dynamic game that lasts a minute where the students make a circle and pass a ball in 30 seconds if the student stays with the ball loses this is repeated until there is a last player.