Twelve?! Wow, that's a lot. My aunt and uncle (the ones who live in the same city) are pretty nice to me. Sometimes when they come over, my uncle and I go with a few of my friends to the park to play soccer. My uncle's really good. Whichever team he's in nearly always wins.
Yeah, especially older family members you barely know.
It's a bit complicated but I'll explain as best as I can.
Okay, first you need to have at least 2 players. There are 4 colours of cards- red, blue, yellow and green. I've forgotten how many Uno cards there are in a deck but I think it's 52. Most of the cards have numbers from 1 to 9. Other cards have +2 or +4. If you get one of these cards, you have to pick up 2 or 4 cards. A +4 card also allows you to change the colour of the current colour of the card on top. There are also colour changing cards that do that. Oh yeah, there are also cards that change the direction of the way you are playing. Example, you are going clockwise and someone puts one of the direction changers (don't know the proper name of these) on top. You have to go the other way, which, in this case, is anti-clockwise. This only works if you are playing in a group (3 or more people).
Right, now you know all the cards and what they do. Time to learn how to play!
Someone in your group has to shuffle all the cards. If you are playing with 3 or 4 people, each of you get 7 cards. It'll be less if you are playing with more people. The person who shuffled the cards, hands them out. Only you are allowed to look at your cards. You all have to decide who goes first and in what direction you continue. To start, someone randomly picks without looking, a card from the cards that are not being used. By the way, those cards are supposed to be put face down, next to everyone. The card that has been chosen is put in the middle so everyone can see it. The person who goes first put a card that is the same colour or has the same number of the card in the middle. For example, if the card in the middle is a blue seven, that person would have to put any blue card or a seven with any colour. The person who is next puts the card with the matching number and/or colour. And then it goes on. If you receive a +2, you have to take two cards (without looking) from the top of the deck of face down cards. The player who finishes all his cards first, wins. Also, if you have one card left, you have to say 'uno'. If you don't and someone else says it, you have to pick up 4 cards. Likewise, you can say uno when someone else has one card left.
Okay, that's about it. I may have missed something but I think I got most of it. Also, there are different versions of this game. It would take ages to write them all down and the rules to play them. What I just wrote down is basic Uno. It's a bit more fun playing the other versions.
Also, I wasn't able to reply to this sooner because we went to a beach today. It took ages to get there and my phone had no charge left and I had left my charger back at home. I brought my Kindle along to read a book on it. But guess what? That was running out of charge too. I spent half an hour reading before it ran out. After that, I just sat there with nothing to do.