Opposition leader Simon Bridges was joined by National MPs Mark Mitchell and Erica Stanford, and Labour's Duncan Webb and Marja Lubeck, in accepting the 143,000 signature on the steps of Parliament this afternoon.
Nathan's father, Orion Kraatskow, said the support the petition had received was "far beyond what we had expected".
Nathan died when learner driver Rouxle Le Roux hit him at an Albany intersection on May 18 this year.
Le Roux (19) had drunk wine and smoked cannabis earlier in the day before her Mercedes crashed into Nathan when he crossed an intersection riding a small bike.
On Friday, Le Roux was sentenced in the Auckland District Court to 11 months' home detention and 250 hours of community work for dangerous driving causing death.
The aim of the petition was to get the Crown to appeal Le Roux's sentence.
"After Nathan's death, we felt sorry for Le Roux, but her behaviour since she has been charged has been disrespectful and shows a lack of remorse," Orion said today, adding that she had "made a mockery of the justice system".
NOT THE WHOLE STORY: LAWYER
Le Roux's lawyer Belinda Sellars said today the public backlash had been "frightening" for her client.
"On Saturday night she had people outside her house, screaming that they want to kill her. She has been too afraid too sleep. It has been really frightening for her."
Sellars said they were also really concerned a lot of what was being posted on social media was "wrong".
"People don't have the full story. From her perspective, people are getting really wound up about this, and they don't know the truth."
Sellars said while she accepted her client was speeding, Kraatskow had gone through a red light.
While Le Roux did not stop, the way it had been "painted that she ploughed through someone", was not right, Sellars said.
"It is true she didn't stop, but she slowed down. It wasn't her car, she had an older driver, the owner, beside her. He and another boy in the back of the car started shouting at her, 'Don't stop, don't pull over, you can't pull over here'.
"She drove on but was overcome as she thought she hit something. She stopped the car and the others took over. She was incredibly upset."
Le Roux had consumed "some wine and cannabis earlier in the evening", but there was no suggestion she was highly intoxicated or "out of her head", Sellars said.
"This is not one of those cases, that are all too common with dangerous driving, where a young person has been drinking all day with their mates, has been driving too fast, and people telling them to slow down. That was not the case here."
Sellars said the speculation that Le Roux was from a "privileged" background was also wrong.
"Nothing could be further from the truth. She has had a very difficult upbringing."
Sellars said home detention was a "tough sentence".
DEPTH OF FEELING
National justice spokesman Mark Mitchell said the size of the petition showed the depth of feeling in New Zealand in regards to this issue.
Bridges said this was a remarkable petition with the same amount of signatures as a New Zealand city.
Although Bridges would not comment on the sentence, he said this case was "hard to explain".
"I would urge the Crown, when they're considering whether to appeal, to be thinking very carefully about the fact there are 143,000 people who have signed the petition."
Webb said he had been asked by Prime Minister Jacinda Ardern to accept the petition on behalf of Labour.
He said the petition was the right thing to do, as it brought the issue to the attention of Parliament.
Charlene Kraatskow said she felt humbled an honoured by the steps everyone has taken to support the family.
"When we started the petition, we thought if we get 10,000 signatures that would be amazing - we got that in two hours."
She said she wanted to see the sentence appealed and for the justice system as a whole to be looked at, to make sure people aren't given lighter sentences in the future.
"The precedence [of this sentence] for teenaged kids is that you can go out, you can drink you can smoke and get behind the steering wheel of a car and kill someone and then they get 11 months at home - I just don't think that's right."
The petition will now be tabled in Parliament.
