The Grapey Bunch:
Vanilla Ice Cream Cone (this one hasn't aged too well):
Bubble Gum Machine:
The origin of these stickers were always a mystery to me, but recently I found some information in a new Scratch & Sniff Sticker guide. Apparently they were made in Canada and are called "Goofy Stickers." There are ten designs in all including a few non-food with eyes ones.