She said more people were becoming aware of the poverty in their community and taking action.
"One local firm bought all of our kids Christmas presents.
"And what was telling was that almost half the kids didn't open their gift immediately, choosing instead to take it home to have something to open at Christmas."
Dr Wills wanted to get the message, "Child poverty - it's not choice" spread through social media in a challenge to Government policy.
"Everything points to things being far tougher than they were 30 years ago.
"That's not right in a country like ours and it's not fair," said Dr Wills, whose five-year term as Children's Commissioner ends in June.
"Today I'm asking New Zealanders to show they share our concern by spreading the message #itsnotchoice.
"If they visit our website they can take part in a selfie campaign and show that we're all behind the need for things to change."