Looks like this isn't quite correct:
"The new, universal child-raising benefit of PLN 500 (EUR 114) monthly is granted for every second child under 18, and for the first child if the family income is below PLN 800 (EUR 182) per capita per month (PLN 1,200/EUR 273 in the case of child disability)."[0]
[0] http://ec.europa.eu/social/BlobServlet?docId=16077&langId=en [PDF]