The first two are fine, but
Every word should start with a capital letter
No period/full stop at the end of a title.
3. Now we are having a home of harmony.
This reads like a word-by=word translation from anothe language like Chinese.
Now We Have Harmony At Home perhaps?
Regarding came/come in title (2),
A Fairytale Came True means "a fairytale came true"
A Fairytale Come True means "a fairytale which has come true"