There are plenty of 'first times' for parents when it comes to their children: First smile, first time crawling, and first steps.

Michelle and Toby Lever, however, are delighting in the moment their 7-week-old son was able to hear for the first time.

Baby Lachlan was diagnosed as having moderate to severe hearing loss in both ears. His parents say, "When he was 7 weeks old he received his first hearing aids. His reaction when they were turned on was truly amazing. We cried from happiness. Our beautiful little boy is now two years old and doing remarkably well."

Having problems viewing this video on a mobile device? Click here to watch.