Send your Son some wonderful Christmas messages and wish him a great time. You can share/send them to your loved ones via Text/SMS, Email, Facebook, Whatsapp, IM or other social networking sites.

Hey darling!
Just want to let you know that we had a fun time being your Secret Santa all through your childhood.
And now even though you're in college and know that Santa doesn't exist,
we want to let you know that we'll still be happy to gift you whatever you ask for.
Merry Christmas!

Enjoy the time and have some fun,
You are and will always remain my number one,
Good wishes to you my son,
Merry Christmas and happy New Year!

Dear Son, wish you a Merry Christmas.
We want to tell you that you're the best thing that ever happened to us,
and come what may,
your Mom and Dad will always be there for you.

Dear Son, as we grow older,
a time will come when we will physically not be there to buy you presents and make you pie.
But you must know that from up above,
we will always be hoping and praying for the best for you.

Christmas wishes for the most wonderful son
You know you are the best
Do not know about the rest
But you surely have a heart of gold
Enjoy your holiday season
You have every reason to stay happy
Wishing you Merry Christmas,
And a happy new year
May you spread a good cheer!

Christmas time is the time to cheer,
So, here is my wish,
To someone very near,
You are my life my son,
Hope you have a great time this year,
Merry Christmas!

Christmas is the time,
To give a shout aloud,
You my child stay Merry,
And make the most,
Out of the crowd,
Merry Christmas and a happy new year!