I do this every year when we go out for conkers
there are these trees and I always go 'oh look conker trees' and they have green spiky balls hanging down from them and they look like they should have conkers in them but they're really just puff-balls of green spikiness and the conker trees are further down with their hard brownish less spikey shells
so what the hell are the green spiky things and why do they masquerade as conkers and make me look like a total twat