This article was originally published in Time.

When people walk into Keri Piehl’s retro toy store in Albuquerque, N.M., their eyes light up. Wooden spinning tops, Yo-Yos, Trolls, rainbow lava lamps, scratch-and-sniff stickers—it’s like time travel, unlocked.

Some visitors make a beeline for the games and puzzles, eager to relive their glory days. “I sell a ton of jacks to grandparents,” Piehl says. “I always joke that I should have an over-50 league, because every single grandma tells me they were the best at jacks.” Others simply want to settle a score. Grandfathers, in particular, enjoy bringing up old marble-related injustices—like the time so-and-so cheated to win the game. “They’re still salty,” she laughs.