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Use "playgrounds" in a sentence
"(You might not need to explain playgrounds are for the children …)"
"Every day, there is that risk of harm, and hurt, at workplaces, at schools, in playgrounds, in the streets, and sadly, unknowingly, even within the sanctity of the home."
"He sat there looking through the pictures they gave him of happy children playing in playgrounds that, to his knowledge, still existed."