People used them as:
Souvenirs from vacations
Many were sold at tourist spots and contained images of landmarks, beaches, mountains, amusement parks, or famous buildings.
Personal keepsakes
Some viewers held tiny family photos or portraits, making them a sentimental item before digital phones existed.
Promotional giveaways
Companies sometimes used them as advertising items, placing a logo, product image, or business message inside.
Novelty toys for children
Kids enjoyed looking through them because the tiny hidden image felt fun and mysterious.
Religious or inspirational items
Some versions contained images of saints, churches, prayers, or spiritual scenes.
Before smartphones and digital photo galleries, small objects like this had a unique charm. They turned a single photo into something portable, personal, and interactive.
