Are titles grammatically correct?

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"

Rules of punctuation have nothing to do with the grammar of English, Tanguatlay. They are merely preferences relating to style.

Many thanks, Contrex and JTT.