Police have arrested a mother and father and accused them of giving marijuana to their young sons — as a reward for good behavior.

Toni Lynn Carlson, 31, and Aaron Virgil Carlson, 23, were booked on suspicion of possessing marijuana and drug paraphernalia, possessing marijuana for sale, contributing to the delinquency of minors and endangerment, police said Friday.

The couple were taken into custody Thursday night after detectives served a search warrant at their home and found a quarter-pound of marijuana.

Police said the boys — ages 12 and 11, and a 4-year-old girl — were in the care and custody of a family member.

The investigation began after authorities received tips from a neighbor about the possible usage and sale of drugs at the home, police said.

Detectives said they didn't know about the family possibly smoking marijuana together until the parents and children were interviewed.