Love Emilia
Ardern took the opportunity to thank the hundreds of Kiwi kids "who believe in the simple power of a letter" and have flooded her mailbox with letters since she became Prime Minister.
"No matter how many years pass, I hope they all hold onto that belief that they can make a difference....because they already do," she wrote.
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It's not the first time that Ardern has shared some of this heartwarming correspondence, previously revealing that an 11-year-old had tried to bribe her into funding research into dragons.
The Prime Minister returned the $5, but promised to keep an eye out for the dragons, adding "Do they wear suits?"
She also posted to Instagram showing the place children's letters have in her bulging bag of documents.
Parents responded to yesterday's post to thank the Prime Minister for replying to some of the children.
One wrote: "My daughter was so thrilled to receive an email back from you. We were amazed that someone in your position took the time to do it. She will never forget it."
Another commented: "Both my daughters wrote to you last year, to discuss their concerns for the environment and to raise the profile of our teachers and the fabulous work they do, they were 7 and 9.
"The fact that you took the time to respond to them absolutely blew them away. It gave them faith that their opinions matter and that everyone has a voice for change."