Dogecoin is about 10 days old. The currency is based on the popular doge meme and will have max 100 billion units. It uses scrypt and has a random block reward.
Price history on CoinedUp: http://doge.yottabyte.nu/
Dogecoin has a surprising momentum to it. I'm curious what role it will play once the initial novelty wears off. There are many more Doge than Bitcoin or Litecoin, so a single Doge will never be unattainable. It has a long way to go to even reach parity with the penny.