Readers of a certain age will most certainly remember their parents collecting and redeeming S&H Green Stamps, along with Blue Chip stamps, Plaid Stamps and a number of others.
Click here to read a history of the stamps from Wikipedia.
I love the little "stamps" on this wooden box:
We always camped as kids on our family vacations. It was the only kind of vacation we knew, really - and we LOVED it!