Most of you will recognize these as horse chestnuts, the non-edible kind. Actually, they can cause serious gastrointestinal damage to humans and can be fatal to dogs and other animals.
Says the Internet:" When you hear the song about chestnuts roasting on an open fire, don’t mistake these nuts for horse chestnuts. Horse chestnuts, also called conkers, are a very different nut. Are horse chestnuts edible? They are not. In general, toxic horse chestnuts should not be consumed by people, horses or other livestock."
