YOU SAID:

I have great kids when they're sleeping

INTO JAPANESE

彼らが寝ているとき私には素晴らしい子供がいます

BACK INTO ENGLISH

I have a great kid when they are sleeping

INTO JAPANESE

彼らが寝ているとき、私には素晴らしい子供がいます

BACK INTO ENGLISH

I have a great kid when they are sleeping