DogeCoin
DogeCoin is an internet currency, cryptographically locked and copied across a network of computers. You can use it online, or in local stores that use apps to convert it to dollars.
It uses the face of Kabosu, a shiba inu from Japan. Her owner keeps a blog with many pictures. See also the Doge meme.
To send your coins to someone else, you sign a transaction with your secret key and their public key, and send it to the network.
The network is made up of a bunch of computers doing some roughly-timed mathematical processing to combine blocks of transactions once every minute.
Your wallet, which stores your secret keys, refers to these transactions to know how much you have left.
The following is a text-heavy slideshow that introduces DogeCoin: DogeCoin Slideshow