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Use "gleefulness" in a sentence
"He scooped up handfuls of it with a dreary kind of gleefulness -- dreary because he must be gleeful alone -- he made tracks all around just for the novelty of it; he snowballed the rocks."
"There's some of that gleefulness, but it's probably a little more serious."
"Take for instance the waltz-like jubilation of "And the glory of the Lord shall be revealed", the otherworldly hush of "And he shall purify", and the gleefulness of "For unto us a child is born" -- all sounding as freshly articulated by our choristers as if newly minted."