A mother who drugged her daughter and suffocated her son was "happy" and "smiling" with medical staff afterwards, Crown prosecutors say.
The woman, whose name is suppressed, is standing trial in the High Court at Auckland, facing eight charges of ill treatment or neglect of a child.
The abuse spanned close to five years, as the mother took her children for more than 100 unnecessary medical check-ups beginning from 2011, prosecutor Mark Harborow said while closing the Crown case on Monday.
He said the woman seemed to enjoy the attention people gave her when she had sick children and so began taking her first-born daughter for check-ups, claiming the girl suffered fever and rashes.
But as medical experts were unable to discover what was wrong, the woman then claimed her daughter was suffering more serious conditions, including seizures and ataxia, whereby a person loses control of their limbs.