Oh we've had this discussion at school frequently recently.
Giving incentives for charity community and just being good, reading.
You'll always have the naysayers. We have one staff member that complains "we give too many incentives, even for going to the bathroom"
My reply SO WHAT, if the kids need some kind of motivational tool (which is why its callled that to MOTIVATE) then so be it. It beats the hell outta getting nothing. Kids shouldnt be expected to totally give into the 'Giving without Receiving, mantra. The're kids, they should be taught to be compassionate and charitable but they're only kids.
Let them act and feel like adult ...Oh my here's the puchnline.. When they're ADULTs.. TADA...
Shawn steps offf his soapbox...
If ya can get the sponsor and support Go for it.