Here's something different.
No car to guess but links. I'll start with a car, and you'll have to find out another car that shares ANY relation with the one I posted. But that's not all, because to get the point, nobody has to find out a link to the car you posted. If nobody continues the chain after one month, the point will go to the last one.
About the links, you can choose simple ones (4-cylinder, American, same builder), more articulated (same designer, same pilot...) or absolutely original (like the one I'm starting with).
Obviously the simple link get 1 point and the hard one more than one, but only the last one will get it so it's not important to define it now.
So easy? No, because you can use the same link and the same car only one time, and If you post the same link r car twice, you'll be warned and if you won't change it in 24h, you'll lose a point and the link will be not considered.
You'll have to post the pic of the car linked to the previous one but if you'll have technical problems, just add a link to a pic.
Here's an example (without pics and with easy links)
Fiat 600
Fiat 600 & Fiat Dino (same builder)
Fiat Dino & Ferrari Testarossa (same engine-builder)
Ferrari Testarossa & Lamborghini Miura (italian)
Lamborghini Mura & BMW 850 (12-cylinder)
BMW 850 & Auburn 850 (same model name)
and so on..
I choose simple links but they will finish soon!
Always open to suggestions...