Play word 子安 子安 こやす guardian bodhisattva, buddha or deity of children or childbirth (esp. Ksitigarbha or Avalokitesvara)
Play word 子忌 子忌 ねいみ collecting herbs and pulling out young pine trees by the roots (annual event held on the first day of the Rat of the New Year)
Play word 子供の喧嘩に親が出る 子供の喧嘩に親が出る こどものけんかにおやがでる when kids get in a fight, their parents come to their aid