Before stamps became stickers, which started in earnest in the United States around 1989, they were printed sheets of paper with water-activated adhesive backing. In 1987, the team at Sesame Street visited the United States Postal Service to see how a stamp, specifically the .22 cent puppy dog Love Stamp, was made.
Watch A girl visits the postage stamp factory.
Follow this with more Sesame Street classics:
• A drum from a barrel
• Making apple cider
• I Beam
• Old paper, new paper
• Spinning clay on a pottery wheel
• How crayons are made
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