Can we add tree node dynamically

[tiffany]

We have a 4 level treeview. Since I know to get all the data from the 4th level will be time consuming, I want to click the 3rd level tree node, then get the data of 4th level and populate the nodes.  To get the data for 4th level when click the 4rd node is fine, but how can I let the new nodes appear without refreshing the whole treeview? 
Thanks for help.

[tiffany]

I think Kendo treeview can add node dynamically. Cannot discard this thread.