I travel and also have a small child, this bag fits securely to me while giving me the freedom of using both hands.  It's great for traveling, too.  On holiday, just cinch it a little shorter and wear it on the front of your body to keep from getting pick-pocketed whle still being able to use both hands to take pictures, sight-see and have a ball!

They have lots of room, the zipper parts open all the way up if you need them too and it's also easy to lock them down with the snaps.

I also have this in the black and fuchsia.  Both bags and colors are great!  I love them!