Children of XElement
The immediate child elements of one XElement are accessible by calling the Element() or Elements() functions. Use the overloads with a name to access specific elements, or without to access all child elements.
There are also similar methods like Attribute() and Attributes() that you might find useful.
XElement.Nodes() should get you what you want.
If you just want the XElement child nodes then you might need to restrict it (depending on your XML) with:
XElement.Nodes().OfType<XElement>()