Drew said:TAP TAP TAP TAP. Don't force them into the game. And certainly don't destroy them while playing.
My mom is easily the best basketball player I know. I have movies of her scoring 40+ with 15 assists back in college. So I grew up playing a lot of b-ball. Unfortunately, I don't have too many fond memories. All I remember is how miserable I was whenever we played. I probably scored a total of 6 points on her by the time I was 14. What kills someone's self-esteem? How about getting the ball stolen every time you touch it? Every pass picked? Every shot blocked? That would make anyone want to quit. It worked that way with everything. I played her some chess once when I was 6. I remember it clearly. She started with my pawns and worked her way to my bishops before I quit, eyes filled with tears.
If you want them to play pool...LET THEM PLAY. As their grandfather, they already see you as the best pool player in the world. They'll back you against Efren any day of the week. You don't need to impress them. You need to encourage them. Let's face it, pool isn't very fun to watch. Seeing grandpa run out all the time isn't going to make them any better, nor is it going to keep their interest.
Playing pool has it's own rewards. It starts with just making balls, then running balls, and finally running racks. Ask yourself, "What first got me interested?" I'm sure the answer is nowhere near getting beaten senseless by the shooters. That's what kept you motivated after several years of play.
My advice: play them one handed, left handed, eyes closed, etc etc. But don't play them too often. Let them play each other. Sibling rivalry will definitely motivate them. Show them some cool things every so often. It sounds like they're a little too new to the game for drills so stay away from those. Drilling is never as fun as playing. And seriously, get them gambling. Play for that little red car, or a candy bar or someone's turn on the xbox. I made my first bet when I was 4. 16 years later, I'm still doing it.
Edit: I don't play much basketball anymore. But I am the first in the family to pick up a cue, and I'll never quit this game...they don't need help having fun.
You did get what age they are, right? 15 and 12. They are old enough to have developed ego by that age. At that age, I would have LOVED to be playing a great player, as long as they taught me a few things.. I wouldn't have cared if I never won a game in a year. Then again, I got more ego, and desire to win, than 10 men..

Russ