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 ...

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.