How do you explain Bitcoins to your Grandma?

[gabgab]

she asks me what i have been doing hunching over the computer over the past 2 weeks.

how do you explain bitcoins to her? preferably with simple english and within 1 or 2 sentence.

[DATA COMMANDER]

Oh man...you don't? LOL.

What's funny is that my grandma was the branch manager of a bank for like 30 years, but she knows nothing about computers, so I have no idea how things would go if I tried to explain Bitcoin to her.

[Dobrodav]

"Grand ma,  i am was happy to found the better ponzy scheme in the world, in starting moment of its rise. I am even do not need money to participate, just my computer time. Thats my greatest chance in all my life"
.
Well, i am do not think like that, but thats how i am will explain it to my Grand ma.

[error]

Hey, it's digital money the government can't cheat you out of! Now, who's selling vodka for bitcoins?

[TraderTimm]

I'd say its "internet money".

A gross oversimplification, to be sure, but still has the right core pieces. Or maybe "Cash without the mass." (I suppose you could add up all the electrons mass that a single bitcoin needs to be represented in binary, but I'm not about to take that on )