ABC Sunset Rotorua has collected more than 500 yoghurt containers for its budding young builders.
It has been just over a year since a small stack of yoghurt containers in the kitchen cupboard were added to the children's construction area, and quickly became a hit.
Centre manager Natalie Hall said staff noticed parents "taking a moment to stop and build alongside their children".
"They are used for stacking, transporting, exploring mathematical concepts like shape and height, [and] fostering our children's creative skills."