What is Scratch and sniff?
'''Scratch and sniff''' refers to paper that produces an [[odor]] when it is scratched. Scratch and sniff is mostly used on stickers. Scratch and sniff stickers are frequently given to children as a reward for doing well in school. Scratch and sniff is created by covering the odor in a covering that breaks easily when it is scratched. Because the odor is covered, it can be kept for a very long time. {{stub}} [[Category:Chemistry]]