Using one stencil only for an event

Ok this may sound stupid but bear with me...

I am doing a small tent sent up at a american cancer fundraiser. We buy the booth and keep the profit.
I will be doing face painting.

This is what I am considering...taking on my fp partners teen daughter as my temp tattoo artist. Since we are both gonna be new at these temp tattoos I thought about only buying cancer awareness ribbons. Then they could choose their cause/color if they want, or do a support your troops colors. There will be alot of adults and kids passing through, so I thought it would hit each group. Do you think using only this stencil would work?? Also I thought this would give the teen the opportunity to raise enough money (god willing) to invest in her own sets of stencils, since after this event she will be pitchin in on booth cost, but then keeping her profits.

Everytime I do a "cause" event I purchase tons of stencils having to do with the cause, and the only one that ever gets used is the one I put on me...lol

I think honestly variety of designs help sell the tattoos.