I will agree with you that having a baby in the house is an amazing time. The focus on this shot is a little soft. I would like to see the focus on the eyes to be cris. Also, this shot doesn't quite capture the challenge, IMO.
In two months my wife will give birth to my first child. I'm sure I'll be taking many shots like this. But, this photograph belongs in this challenge like a beautifully composed poem belongs in a corporation's annual report. There are photo competitions on the internet that allow for submitting your best photo (or a photo of your choice), however, I believe this site is prompting you to take shots that you wouldn't have otherwise by followin the description of the challenge. I hope this comment is constructive. If your photo finishes lower than you had hoped this might be the reason. Good luck.