Sandy and Lionel Waldman, and granddaughter Allison, tell PEOPLE about the story behind SandyLion Sticker Designs and their years growing the company amid a sticker boom.

It’s hard to drive anywhere in the city right now without seeing an irreverent bumper sticker. Here's how the trend went beyond 'Coexist' and into overdrive.

IT’S A SHOW OF PRIDE AND INDIVIDUALITY THAT COLLECTIVELY, WE’VE COME TO LOVE. BRIGHT YELLOW BUMPER STICKERS WITH BOLD BLACK LETTERS AND A RED HEART MAKE A STATEMENT SAYING I LOVE CITY LIFE.

One recipient was Natasha Sexton, who flipped over the sticker that read “THANK YOU I LOVE YOU." She paused, surprised by Hernandez’s stern presence and asked if they could hug.