
"watch other people's children"? Or is "children" not necessary in this case?

It's not necessary. It's an ellipsis. I added another sentence with the same structure:
http://www.tatoeba.org/eng/sentences/show/2584975
http://www.myenglishpages.com/s...g-ellipsis.php
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This sentence was initially added as a translation of sentence #2584638
added by Dejo, July 11, 2013
edited by Dejo, July 11, 2013