A popper is a type of small, often colorful toy that makes a noise when squeezed or pressed. These toys are typically made from soft plastic and filled with air or liquid, creating a rattling sound as they shake around inside. Poppers can come in various shapes and sizes, including animals, cartoon characters, and geometric designs. They are often used by children for play and entertainment, but also appeal to adults as stress-relievers or desk toys. The term "popper" is sometimes used interchangeably with other names such as "fidget spinner," "stress ball," or "squishy."