Just For Laughs Dr. Stinky's Scratch N Sniff Stickers 6-pack and Sticker Book Gift Set- Chocolate, Rootbeer, Pineapple, Orange, Watermelon, Lemonade 162 Stickers 1 copy of Dr Stinky's Sticker Book which makes this set a great gift for the young collector. Scratch N Sniff Stickers 6-Pack- Chocolate, Rootbeer, Pineapple, Orange, Watermelon, Lemonade What enables Scratch-N-Sniff Stickers to last so long? Micro-encapsulation is a process where fragrance is captured into a tiny bubble. The bubble is then applied to paper during the printing process. Each microscopic bubble attaches to the fibers of the paper. Only when you scratch the sticker is the bubble broken and the scent released. By encapsulating each scent, the life of Scratch-N-Sniff stickers is drastically increased. The Stink Factory uses the highest quality inks, scented oils, and printing presses. All components for Dr. Stinky's Scratch-N-Sniff Stickers are made in North America. The Stink Factory performs extensive safety tests. In addition, we pride ourselves in selecting the highest quality scents and the best printing presses. Rest assured mom, Dr. Stinky's Scratch-N-Sniff Stickers are a safe way for kids to have fun. Please Note: Sticker assortments may change due to availability.