YOU SAID:
Going to hide in my grandmother's great grandpa's house with a cookie
INTO JAPANESE
祖母の曽祖父の家にクッキーを持って隠れよう
BACK INTO ENGLISH
Hide with your cookies at your grandmother's great-grandfather's house
INTO JAPANESE
あなたの祖母の曽祖父の家であなたのクッキーで隠れてください
BACK INTO ENGLISH
Hide with your cookies at your grandmother's great-grandfather's house
That didn't even make that much sense in English.