The 46-year-old father was arrest after admitting he owned the Ecstasy stashed in his car.
The incident isn't the first time a parent has inadvertently given drugs to their child.
In 2012, a Wanganui woman was convicted of giving cannabis to her 3-month old baby through her breast milk, in what is believed to be the first case of its kind in New Zealand.
The 29-year-old was charged with administering a class C controlled drug, namely cannabis, to a person under the age of 18.
She pleaded guilty and was sentenced to six months' supervision.
In 2018, a US mum was charged when her baby died from drinking breast milk that contained drugs.
Samantha Jones' 11-week-old son was killed by a cocktail of methadone, amphetamine and methylamphetamine passed through the Pennsylvania mum's breast milk
The 30-year-old Jones reportedly told authorities she was prescribed methadone for her addiction to painkillers.