Amanda said she had tried to explain the terror attack to her sons, but that it was no easy task.
"It's hard to know what to say to a child, but I did my best to explain the situation and gave them a big talk about it.
"We thought it was important to come and show our support."
Six-year-old Levi Rawlinson said he was confused about the attack in Christchurch.
"Why would someone do that to people?"
The flower arrangement was organised by members of the Cambridge Community Board.
Cambridge Ward Councillor Sue Milner, who is on the community board, said it was important for Waipā residents to have a way to show their respect.
"This horrific event only happened on Friday and we're all still a bit numb," she said.
"Living in the Waipā, we can't go and bake cakes and take them to the mosques in Christchurch.
"But laying flowers is a way to show we care. Last night there were many people arriving with flowers, which was nice to see."
The events in Christchurch hit close to home for Sue, who is originally from Christchurch and still has family there.
"Linwood Ave is where my father's family grew up and Deans Ave is not far from where I went to school.
"We really feel for the people of Christchurch and it's so sad that someone has done this."
The flowers will be on display until the end of this week.
