What did Peatl do when she played?

Pearl played like an ethereal fairy. Check out this quote,

"so perverse, sometimes so malicious, but generally accompanied by a wild flow of spirits, that Hester could not help questioning, at such moments, whether Pearl was a human child. She seemed rather an airy sprite, which, after playing its fantastic sports for a little while upon the cottage-floor, would flit away with a mocking smile. Whenever that look appeared in her wild, bright, deeply black eyes, it invested her with a strange remoteness and intangibility..."

Pearl certainly didn't play like other kids. Pearl was a "free spire" in such contrast with shackled spirit of the Puritans. She seemed to commune with nature and the gentle spirits not seen, or the thought of them condemned, by the Puritans.