Wonder Bread Racing Team Sticker - Wonder Wagon - 1973ish
Here's a cool sticker of the Wonder Bread Wonder Wagon!
This MIGHT have been available in packages of Wonder, but I'm guessing it was more of a straight auto-enthusiast or garage sticker. I'm not really sure.
For lots more cool Wonder Wagon stuff, check out Grickily's amazing set of Wonder promotional items featuring the Wagon!