I recentely had an idea for a card game about Mario Kart.
The game works fine and a friend of mine played it with a group of children without any problems.
If you want to try it you can download all the rules and cards from my Blog
It's all in german though. If someone wants to translate it to another language, so more people can hopefully enjoy it, then more power to you!
And if someone wants to publish custom Designs or custom rules or whatever, than that's fine with me too (I mean, I already use Nintendo's art).
I'd also appreciate some feedback, if you want to ^.^"