[quote name='Yamato']Since you started a thread about it, what years for what coins are silver? And what do you actually do with them?[/QUOTE]
Any dime/Quarter/half dollar minted 1964 or earlier is silver. If you look at the side of one of these coins, it's completely sliver colored. A newer one will have a band of copper in the edge from the filler metals.
I love seeing the weird coins that turn up in my change... I've gotten many silver quarters and dimes- seriously, there's a fair number of dimes out there, although I haven't had one recently- plus buffalo nickels, mercury dimes, many wheatback pennies... the best was the 1893 indian head penny.
I read an article ages ago about a coin collector who purposely spent 2 coins worth a few thousand each, to try and get people to pay more attention to their change. I don't know if anyone ever found those...