Is it correct?

[philadelphia]

I thank all of you for having thought of me. Or maybe it could go this way: I thank all of you for having thought of my birthday

Just to thank the boys and girls who thought of my birthday.

Are they correct? If so, which one sounds better?

[colloquium]

I thank all of you for having thought of me. Or maybe it could go this way: I thank all of you for having thought of my birthday

Just to thank the boys and girls who thought of my birthday.

Are they correct? If so, which one sounds better?

They are both okay.

I would probably use something a little less formal like:

Thanks to everyone for the birthday wishes. They really brightened my day!

[philadelphia]

Perfect