The Sensible Sentencing Trust, "outraged" by the manslaughter charges faced by Moko Rangitoheriri's killers, are calling for people to protest outside High Courts around the country next month.
The organisation plans to hold protests on June 27, the day Tania Shailer and David Haerewa are to be sentenced in the High Court at Rotorua for killing 3-year-old Moko.
Shailer and Haerewa previously pleaded not guilty to murder, but on the day their trial was due to start they pleaded guilty to the lesser charge of manslaughter and ill-treating a child.
The pair were abusing the toddler in the two months leading up to his death, when he was left in their care.
Moko was kicked, slapped, stomped on, had faeces rubbed in his face and was bitten.
He died in Taupo Hospital in August last year after suffering internal bleeding, septic shock from his leaking bowel and swelling of the brain as a result of his caregivers' abuse.