Zach said the Buried Village had a lot of cool things and wakas.
He said he was interested in volcanoes because they erupted and it could come out in ash.
Ollie said he liked the Buried Village because it taught you about villages.
He said he was interested in volcanoes because eruptions did not happen often and lava could explode.
General manager Mike Gibbons said the open day had been buzzing, and by halfway through the day he thought about 400 people had come through.
The open day is also a fundraiser for a local cause, with year's recipient being St Chads Charitable Trust.
"We think we are going to raise some really great money for them."
Gibbons said a lot of locals enjoyed the opportunity to go out to the village, as in their busy lives they did not have that opportunity to see some of the local attractions.
The open day included a treasure hunt, colouring competition and games for the children, as well as a kapa haka performance.
Gibbons said he enjoyed listening to some of the stories people came through with.
On Saturday three screenings of the Rotorua Stories Movie, which takes viewers into the heart of Te Wairoa, were held at the Rotorua Library.
The eruption of Mount Tarawera remains one of New Zealand's worst recorded natural disasters.
More than 120 people died and entire villages disappeared forever.
People from Te Arawa lived near the mountain, with Tūhourangi holding power over the Tarawera lakes district, including the terraces of Rotomahana.
Before the eruption the Pink and White Terraces, a major tourist attraction once described as the "Eighth Wonder of the World", had drawn people from all over the world to Tarawera.
The terraces were destroyed during the eruption, along with the livelihoods of nearby tribes which relied on the visitor trade.