noun, noun or participle which takes 'suru'
hopping on one foot
Refers to the action of hopping on one foot, often as a playful or childish activity. Can be used as a noun or with する to mean 'to hop on one foot'.
子供たちがけんけんして遊んでいる。
The children are playing by hopping on one foot.
けんけんはバランス感覚を養うのに良い運動だ。
Hopping on one foot is a good exercise for developing balance.