For those unaware, the Buckeye tree is the state tree of Ohio.
It is a distinctive looking tree nut that is inedible to humans.
This sign below was found outside a church and in this instance, a "Buckeye" is the name of a confection.
They are made to look just like the Buckeye nut from the tree. They consist of a peanut butter center surrounded by chocolate, but there is a small circular section at the top with no chocolate, so you can see the peanut butter center.
Link below will give info on the tree and has a pic of what the dried nut from that tree looks like.
en.wikipedia.org
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