楽しさのあまり落ち着きを失うさま。

欢快地，轻快地，快乐地，兴高采烈地

1. cheerfully, buoyantly, happily, in high spirits

adverb taking the 'to' particle adverb (fukushi) noun or participle which takes the aux. verb suru word usually written using kana alone

うさぎが、ウキウキ、あいうえお

小兔子呀，兴高采烈，a i u e o