Nuts and Seeds
Peanuts and almonds are the most common nuts found in the bronchi. Peanuts create more bronchial inflammation than any other food. Even small fragments of nuts in candy or baked goods can be inhaled by toddlers, who lack molars.
As Dr. Chevalier Jackson stated (over 100 years ago), after a nut enters a toddler’s mouth, one of three things can happen: the nut can be spat out, it can swallowed whole, or it can be inhaled into a bronchus. Toddlers can not grind a nut (or even a nut fragment) to a paste, to allow safe swallowing.
A small spoonful of chunky peanut butter or a handful of nuts, if inhaled, can be lethal.
Both sunflower seeds and their shells are also choking hazards.