"We were amazed at New Zealanders' generosity," the girls' parents said in a statement.
"We in no way blame the Turangi community for what happened and so we wanted to give something tangible back. We understand they are fundraising for a new children's playground and so we want $5000 spent on a piece of equipment that young people in Turangi can enjoy."
They said it was hard to measure the impact the attack would have on their daughter's future, and the rest of the money would be devoted to her well-being and future development.
"One day we want to return to New Zealand with our family - we want our son and daughter to see what a beautiful country this is and realise how much love, care and attention your country gave us," they said.
"We must make mention of the people at Waikato Hospital. What they've got is very special and it is something we have not seen in Europe. Everyone including management, doctors, nurses, mental health staff, social workers, receptionists, telephone operators, attendants, those in the mailroom and so many more all showed compassion and worked together as a team to help us.
"Donating money to purchase paediatric equipment is a small way we can thank them."
A spokeswoman for Prime Minister John Key described their gesture as "extremely kind".
"The Prime Minister wishes the parents, daughter and son well as they recover from what has been a deeply traumatic time for them."
Their recipients have been moved and astonished by the gesture.
"That they can do something so positive for Turangi in spite of their terrible experience here is heart-warming and remarkable," Turangi-Tongariro Promotional Association chairman Jen Shieff said.
"The people of Turangi will appreciate the understanding shown by the family and it will help us to move on with our plans to revitalise the town, feeling hopeful and grateful."
Turangi's council representative, Gary Keepa, said "There are no words to summarise this sort of kindness, except 'thank you"'.
Taupo Mayor Rick Cooper said he was pleased some good had come out of what was a "despicable, horrible" crime against an "innocent, beautiful young girl".
"Everybody is hurt over this selfish crime and I think it's a wonderful gesture that they forgive the people of New Zealand for what a fellow New Zealander has done."
Victim Support chief executive Tony Paine said the $4000 would go towards helping victims of crime and trauma in Hamilton.
The $2000 given to ECPAT Child Alert would help the agency in its work towards stopping the sexual abuse and exploitation of children, national director Alan Bell said.
"Unfortunately New Zealand has shocking statistics that reveal a poor record in terms of child sex abuse. In this case, the abuse was horrific and an absolute tragedy."
Turangi resident Vicki Ham, who co-ordinated the fundraising effort for the family, said she was "blown away" by the family's generosity.
Another resident fundraiser, Beth Macgregor, said the family had reassured the Turangi community. "That's just so good of them."
The family also wished to thank Victim Support, Air New Zealand, Juicy Rentals, AVIS, the Taupo Tourist Board, NZ Holiday Park Association, Ventura Inn in Hamilton, their hosts in Dunedin, Queenstown, Hamilton and Takapuna, the Turangi community, children who gave up their Christmas gifts and money for their daughter, those who sent presents and messages of support, and all who donated to the fund.
