You'll want to look at a beginner gun that is easy to shoot, low in recoil and something that shoots cheap, plentiful ammo and a .22 is the way to go. My first gun was a Marlin Model 60SS .22 rifle. I loved that gun and killed many a can with it all summer long when I was a kid. Another good .22 rifle and one that I recently picked up is the Ruger 10/22 .22 cal. They make it in many different models and all come with a 10 round magazine. They are pretty cheap (mine was on sale at Bass Pro Shop for $189.99) and they make many different aftermarket parts for it including stocks, tiggers and barrels.