That would work if Osem has the child's Google account details and password?
If you do, this would be the link to go to.
https://www.google.com/android/devic...r?hl=en_GB&u=0
You would need to enable it on the child's phone though first.
Here's how to.
http://www.pcadvisor.co.uk/how-to/go...evice-manager/
I still prefer to use Google+ location though, as I have the whole family in, and we can all see where we are at any given time.