The Government is planning to gather annual data on how many kids guzzle fizzy drinks, eat fast food, ride or walk to school - even how much screen time they're getting.
It's part of a push to start setting targets to measure whether the Government is making progress on cutting childhood obesity.
Health Minister Jonathan Coleman said a set of 15 indicators would be published annually to help monitor progress on the Government's Childhood Obesity Plan, published in 2015. The first report of the new indicators will be released in 2018.
It comes hot on the heels of University of Otago research that found being overweight or obese at the age of 3 was linked to a higher risk of heart disease in middle-age.
"Obesity is a serious issue threatening the health of young New Zealanders, which means some of our kids could end up living shorter lives than their parents," Coleman said.