Babies grow and change quickly in the first 12 months of their lives. It's an exciting time, and each month brings forth new developments. Usually, it is when they reach about six months old that they begin to laugh loudly. They are also able to make babbling noises that are the building blocks of real language and sit up with much better head control. As a result, it's an exciting time for parents as well. Around this age, babies also begin to recognize familiar words and what they mean. The baby in the video is only seven months old, and his reaction to the funny guitar sounds his father makes is adorable. It's impossible to watch this one without smiling and laughing along.