Mucks you beat me to it!!!
What age children, what are he/she/they into??? If you post back I may be able to offer some pointers as I have three and there will be other people too who have some thoughts.
As people here will know I am not the biggest fan of MSN and in any case I would want to know the age of the child/ren before suggesting it. There's some quite nasty stuff going on with MSN with younger ones certainly in my area - by that I mean name calling, bullying etc..... That's before we start to consider the security issues - spyware and the like and the sharing of files and the like between young people who don't know what they are doing.
Give us a bit more information and we will do our best to help!!
Love
Gabs xx