playground

pleasant, delightful, fun, enjoyable

play, amuse oneself, enjoy oneself / spend one's time idle, do nothing / for an item not to be in use, be spare or idle

happily

new, novel / latest, recent / modern / fresh

child

(archaic) new, novel / (archaic) latest, recent / (archaic) modern / (archaic) fresh

(obsolete) Alternative spelling of 新たし (aratashi): new, novel

(obsolete) Same as あたらし (atarashi) above

park