Police in Manawatu found three children at a house in Feilding during a raid to disrupt a drugs ring making methamphetamine ('P').
Two men and a woman have been arrested and charged with drugs offences.
Police say they recovered more than $40,000 in cash, drug paraphernalia and a large container of white powder from the house in Ferndale Place.
The powder is being tested to determine whether it is 'P' or an ingredient used to make it.
Police say the children were of school and preschool age.