whatelseisleft on "Tipping Counselors"

Was inspired by the tipping thread and the $.25-$.50 an hour thread.
In terms of day camp counselors-
Do you tip?
if so:
Do you tip based on length? ( if your kid/the staff member was only there for one half?)
Do you tip based on age? ( the cit/jc/counselor)
Do you tip based on the amount of counselors there are? ( like do you say im spending $60 or do you do it individually? )
And how much should one be tipping?