(My mom coming up with this one is no surprise to me)
What if we experience bad weather? If it's cold out we can still box,
but if we're in the middle of a blizzard a lot of people won't be able
to drive.

Also how about the stamp carving contest in age groups such as:
6 and under
7-10
10-16
and 16 and up
professionals (this is your category Drews)

Just a few more ideas.

Debbie