Other activities include learning how to make and use poi and a Tug-o-War competition.
Ms Davidson said it would also be a chance to learn more about the Treaty of Waitangi.
"The more educated people are about the treaty, the less critical they are and the more they understand it," she said.
They are also planning a Facebook page to promote the event and to allow people to order Waitangi Day t-shirts and singlets.
"I would like to encourage every kind of culture to come down," Ms Te Tau said.
"Waitangi Day is not just a Maori day, it's a celebration of New Zealand."
Agencies that will have information stalls at the event include Whaiora, Hauora, Rangitane O Wairarapa, Stopping Violence, Te Rangimarie Clinic Services and King St Arts.
There will also be a hangi, "fry" bread, ice-cream and sausage sizzles for purchase although people can bring their own lunches.
Performances will include Lenny T - the cuzzy bros and the chur sistahs, Koia, Dancing Samoans and kapahaka.