Puppy times - my puppy learns a new trick

I got two puppies in January and they are growing so fast I try to take pictures to remember how cute they were when they were little.  Most of the time I capture it on my cell, which isn't the best camera but its better than nothing.  We've been trying to keep them from jumping up on us and so when one of them learned to role on his back to be petted we've been encouraging it.  Here's some images when he first started to do that trick.