counting rhyme

pleasant, delightful, fun, enjoyable

happily

to sing / to compose poetry / to recite poetry / to tweet, said of birds

child

past of 歌ってみる (utatte miru, “to try to sing”): tried to sing

utattemita, a class of music where 歌(うた)い手(て) (utaite, “amateur singers”) cover songs

(figuratively, uncommon, possibly archaic) describes a state of having few visitors, of being lonesome, desolate, or unpopular, especially in business

plural of 子供: children

child's naive mind, child's juvenile mind