Updating Multiple Child Objects And/Or Collections in ASP.NET MVC View

Have you found yourself using ASP.NET MVC quite merrily building views and controllers and master/detail forms with 1-1 objects from your database to your view and now you’ve hit a hairy case which has ruined everything when you have a child and/or child collection object you also need to update on the form (or multiple of each one!) and have no idea how to tackle it? *breath* Well I was the same up until about an hour ago.