Logan Mwangi was discovered in the River Ogmore, Bridgend county, on 31 July.
The mother of a five-year-old boy who was found dead in a river has been charged with his murder.
A 14-year-old boy, who cannot be identified because of his age, has also appeared in court charged with murder.
Logan Mwangi, also known as Logan Williamson, was discovered in the River Ogmore in Bridgend county on 31 July.
Logan’s stepfather John Cole, 39, from Sarn, has already been charged with the murder.
Both John Cole and Logan’s mother Angharad Williamson have also been charged with perverting the course of justice.
The 14-year-old has been remanded into care of the local authority.
Judge Michael Fitton QC has set a provisional trial date of 31 January 2022.
Following Logan’s death, residents left floral tributes, teddies and cards near the part of the river where he was found.
Logan’s classmates have described him as a happy boy who liked Spiderman and playing hide and seek.
His friends were “heartbroken” by his death.