L.C.
Marshmallows should indeed be kept away from small children. Babies have no more reason to eat solid puffs of sugar than anyone else does -- they need quality nutrition and marshmallows don't deliver that.
Marshmallows melt when held in the mouth, and if the child inhales it, or has a mouth so full that it melts into their lungs, they die. There is no way to get that sticky mess out of lungs, even if they don't immediately suffocate.
What is understandable about berries or any fruits? I've never heard of keeping them away from small children...
Tomatos, oranges and strawberries often cause allergic reactions in very young children, so they're not usually recommended as infant foods for the under 1 kids, but that's the only ones I know about... ???