I liked the video description of functions that likened a function to a sports movement in basketball. Unfortunately, basketball is not a sport my class is familiar with and I am not at all sure of sport moves in AFL or Rugby.
There are two girls in my class who like to show me a 'move' on the oval in play time. They leap off the bank and jump high spinning once in the air before landing. They call the 'move' a twirly-whirly. In teaching 'functions' to my class I would use this as an example. But instead of calling it a 'twirly-whirly' I would begin by saying each of the steps in the move. E.g. "Leap off the bank with your right foot extended, use your arms to spin your body around in one turn, now land on the ground."
I would take the class out to the bank and tell them we are going to be like acrobats in the circus. We will all learn the same steps to a routine. As we do the different steps I will put in the steps for the 'twirly-whirly' but get really stressed trying to fit in all of the commands before they finish the move. Then I will say to the kids, "There has to be an easier way of telling you which move to make instead of the one I'm using at the moment. Can you give these steps an easier name?" When the class comes up with a name I will use it in place of the individual steps. We will all know what is involved but it will be easier to say.
Then we will move inside and write down and watch the video that teaches the class how to make a bead sun catcher.