I sincerely hope there are Dunmer children! It wouldn't make sense if there weren't any children on Solstheim at all, since children now are implemented in the game. And I think mer children are terribly cute.

(I would jump with joy if they implemented children of different ages as well, some toddlers and babies, but I don't count on it - maybe for TES VI.)
Whether they would be up for adoption... It would be great if they were, but I won't get my hopes up.