Sentence:  Thus shielded , we played many foolish games in comfortable <WSD>unselfconsciousness</WSD> ; even when the fences became a part of the game - when a vine embowered gate-post was the Sleeping Beauty 's enchanted castle , or when Rapunzel let down her golden hair from beneath the crocketed spire , even then we paid little heed to those who went by on the path outside . 
Meaning of the word marked with <WSD> tags:  the quality of being not self-conscious; unawareness of yourself or of others' views of yourself