Jax trying to laugh

Jax has been progressing so much these past 2 weeks or so. The last couple of days he has been trying to laugh. He will laugh once and stop and will sometimes turn into a cry. I think he just knows how to make the sound and cry so that is why he does it. This is one thing that Shaileen and I have been looking forward to so much. We don't want him to grow up. However, at the same time we want to hear his voice!