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How do scratch-and-sniff stickers work? by Brain Stuff | Mixes.VuiZ.Net

How do scratch-and-sniff stickers work?

Tags:#Howstuffworks #How stuff works #Marshall #Scratch and Sniff #Snickers

How do scratch-and-sniff stickers work?

Brain Stuff

0:000:00

Description

Scratch-and-sniff stickers are novelties that delight both children and adults. Sniff out the ingenious technology that makes them work in this podcast from HowStuffWorks.com.

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