Around 70 pupils attend the school on the Penrhys estate, which was closed on Thursday following Olivia-Grace’s death.
Gaynor Davies, director of education and inclusion services at Rhondda Cynon Taf Council, described the Year Four pupil as “a cherished member of her close-knit school community and will be deeply missed by everyone”.
“I want to thank school staff who administered first aid until paramedics arrived to take over and transport her to hospital, where sadly, she later passed away,” she added.
A police spokesperson said an investigation on behalf of the coroner was under way, while the Health and Safety Executive (HSE) said it was aware of the incident and making enquiries.