Staff and youngsters at Ynyswen Infants school attended the unveiling of a plaque in memory of Carol Harris, who was instrumental in gaining the funding for the playground.
School head teacher Susan Rowlands told a packed hall that young pupils were given letters to take home appealing for help in raising cash for the project.
Mrs Rowlands said: "Our appeals did not meet with any success but all was not lost because we did get a solitary response from a lady named Carol Harris.
"In a lovely letter Mrs Harris said that she knew just the person to help to fund the playground-her husband Robert who is an administrator with the Wooden Spoon organisation."
Mrs Rowlands said:"Bob Harris offered to help and because of their efforts along with everyone linked to the Wooden Spoon the young pupils now have an adventure playground which gives them immense enjoyment.
"Carol Harris will never be forgotten at this school and we are sincerely grateful to the Wooden Spoon for donating £13,000 to fund the project."
Also at the unveiling was Rhondda Cynon Taf Mayor Sylvia Jones and representatives of the Wooden Spoon while the special guest was Wales, Cardiff Blues and British and Irish Lion rugby player Martyn Williams MBE.
Unveiling the plaque Martyn Williams said:"It is a brilliant gesture by the Wooden Spoon and a privilege for me to unveil the plaque."
Carol and Bob, of St Stephens Avenue, were a popular couple in the community and for several years were mine hosts at the Griffin Inn in Pentre.
Mr Harris said, "It was a very proud day for the family. For a plaque to be at the school bearing Carol's name has a very special meaning."
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