New York City-based lingerie brand Hanky Panky’s Valentine’s Day pop-up in Union Square.. Photo: Courtesy Hanky Panky Pop-ups aren’t new, but they’ve become even more popular since the early 2000s.

This is the definitive reference book for the aspiring paper engineer. The lifeblood of pop-ups is kinetic energy, or the energy resulting from motion. When a card or book is opened, wonderful things ...

Pop up cards are fun to make and receive! Smiles are guaranteed when you open this type of homemade card, as they’re such a surprise. Sending a pop up card is more thoughtful than a standard greetings ...