Have a stack of quarters from the floor to the top of your head OR $225?
Whichever answer you choose, justify your reasoning with mathematics.
Help for teachers:
According to Wikipedia, average height for girls by age:
According to Wikipedia, average height for boys by age:
If you want a better conversation, change the $225 to suit your class needs:
Oh, thickness of a quarter might help:
Let me know if you use this one and how it goes!