Link to container as link to first child

Hi. Is it possible to show links to container with some child elements as a link to first element?
For example, i have such structure

-Parent1
--Child1
--Child2
-Parent2
--Child1
--Child2

And i want such menu
-Parent1 (link to Parent1.Child1)
-Parent2 (link to Parent2.Child1)

Make the container a weblink and link it to its first child.

Problem is what i have ~200 containers, and its contents may be changed

Did you check the "first child redirect" snippet ?
For Revo: http://modx.com/extras/package/firstchildredirect
Evo: http://modx.com/extras/package/firstchildredirect-evo