Summer Writing Surprise

Sometimes I find myself in the possession of random classroom sets of coupons for various things, and I'm not always exactly sure how to use them.  Like these...

I'm not an advocate of bribery and try to avoid it as much as possible.  I value intrinsic rewards, but I think the way I want to use these coupons for summer writing admittedly borders on the external.  When it comes to writing, my kids are accustomed to being writers every day during writing workshop and many make the choice to write during Daily 5 too.  Writing is a natural part of their day.  It can be a different story when it comes to writing over the summer.  Each one goes home for summer with a packet like this to motivate them though.  (Go here to see what it's all about.)  

Sometimes I hear from a handful of them and sometimes not so much.  (I realize that can have something to do with parents and stamps.)  Again, I suppose this will resemble bribery, but I told my little ones that if they write to me, I'll send them a little surprise.  That's where the coupons above come in handy.  I guess I mention all this to say, those random coupons that you might find in your possession could be used for the same purpose.