My dad bought me a puppy for my birthday and I love him because he's very friendly and loves to runa around and play.  And when I'm watching tv, sometimes he sits beside me and puts his head on my lap or even sits on my lap.  I saw my neighbors' dog and they can make their dog roll on its back and even jump while walking.  Can I teach my dog the same tricks? What other tricks can I teach my puppy and how long would it take to teach one trick?  Is it good to start teaching him tricks while he's still a puppy or should I wait a few more years until he's older?