7 is my favorite number, It is a natural number.
I like the number 7 too!  I always bet on it at the casino!
Do you play Roulette? Roulette on French mean "little wheel".
Yes, I do!  I think it's an awesome game and I play it every time I go to the casino!
 the sum of all the numbers on the roulette wheel is 666. That is interesting. 
Wow, I didn't know that!  That's not very lucky!  Reminds me of the Devil!
Yes, that was my fist thought too. Have you try Live Roulette?