How to say this is the house in which they lived when they were children. in Japanese
1)
これはこれは(koreha) (exp) as for this/hey there/see here/i say彼ら彼ら(karera) (n,adj-no) those/theyがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/and子供子供(kodomo) (n) child/childrenのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question頃頃(goro) (n) qing住んno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbでで(de) (prt) indicates location of action/at/in/indicates time of action/indicates means of action/cause of effect/by/and then/so/indicates continuing action/ indicates certainty, emphasis, etc.いたいた(ita) (int) ouch/ow家家(ie) (n) house/residence/dwelling/family/household/lineage/family nameですです(desu) (aux) be/is/are。。(。) Japanese period "."
