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.

Surprise your loved one with a DIY Valentine’s Day pop-up card that opens with love! 💖 This easy and creative handmade card uses basic materials like paper, scissors, and glue to create a 3D heart or ...