Click on the coin for it's specific tone. Make sure to turn your volume down if you have headphones on, I don't wanna blow out your ears :c
A virtual redbox. Includes the sound of American quarters, dimes, and nickels, and a Canadian quarter. (because Canadians are awesome.) For those who don't know, a redbox is a device used to get free calls from payphones. When you insert a coin, a sound is played to the payphone that tells it you have inserted that coin. A redbox makes these sounds so you don't have to spend any money. Keep in mind this kind of stuff is illegal if you actually use it on a payphone in some states/provinces, and even though payphones aren't really relevant anymore, this is only to be used for educational purposes.