Saw a link to the Busy Beaver Button Museum today. It's a great collection of historical political button designs... as well as other historical buttons.
And although it will date me a little, I should mention that in 1980 I was the only kindergartner in my school to vote for President Jimmy Carter... much to my staunch Republican father's chagrin. I just liked peanuts and thought President Carter was a pretty cool guy. I would have loved one of these buttons, and still would.