Parents of seven who let their children have tattoos and play with pick axes say they are "not bothered" that they are failing academically because school tests do not measure "intelligence".
Gemma and Lewis Rawnsley from Hebden Bridge, West Yorkshire, allow their children to swear, set their own bedtimes and "make their own decisions", the Daily Mail reports.
Skye, 13, Finlay, 12, Phoenix, nine, Pearl, eight, Hunter, five, Zephyr, three, and one-year-old Woolf are raised in a household where there are few rules.
The family are the subject of a Channel 4 documentary series called Feral Families, where parents explain their 'off-grid philosophies'.