It's a happy holiday for sure. Our annual fund-raising campaign on behalf of Children's Hospital has steamed right past the $100,000 barrier, and is heading for . . .

Who knows? Maybe a new record. We can hope, anyway. All it will take is another $215,000 or so.

Did he say "all?" Two hundred grand is hardly chicken feed, even if your name begins with a Rock and ends with a Feller. We need your help, folks. We aren't going to come close to reaching our goal without it.

If you have finished opening presents as you read this, why not take a minute to be part of this year's campaign? Every cent you give goes to patient care. And every cent helps to provide care for kids whose families might not otherwise be able to afford it. Those are two policies worth helping to preserve on this day of love for our fellow man.

Oh, yes. The totals. Here they are, at the midpoint of our eight-week-long campaign:

Grand total to date: $108,547.10.

Total given this week: $45,978.98.

Individual donors to date: 2,021.

Group donors to date: 234.

A reminder: If you itemize deductions on your income tax return, your contribution to the hospital is deductible. Only six days remain in 1982. I think you forgetful ones and you procrastinators read me loud and clear.

To contribute to the campaign:

Make a check or money order payable to Children's Hospital and mail it to Bob Levey, The Washington Post, Washington, D.C., 20071.

Donation of the week comes from Kerry Byers of Chevy Chase, who writes:

"This year, as every year for as far back as I can remember, a Christmas card came in the mail for me. I knew what was enclosed as soon as I saw the handwriting.

"My grandmother sent me a check for $10 along with a sound chastening directed toward granddaughters who neglect to say, 'Thank you.'

" . . . This year, I am doubling her gift to me, and am sending you a check for $20 in the hopes that another little girl will grow up to be chastened by a grandmother such as mine!"

Kerry has gotten the message, it appears. If you haven't contributed yet, I hope you have, too.