Children are not the only ones who can swallow non-food items. An object can be swallowed by mistake (for instance, if a carpenter is holding nails between their lips or a dressmaker is doing the same with a button). People with swallowing disorders, strictures, a neurological impairment such as dementia, or who are intoxicated can also ingest inedible objects.
In adults, the most commonly swallowed foreign objects are bones from food (like fish or chicken) and dentures.