Give them an ultrasound picture (or a photocopy of one).

Send out birthday invitations for the estimated due date.

Take out a “Help Wanted: Grandparents” advertisement in their local classifieds and point them to it.

Invite them to dinner (at home or out) and serve a frosting-inscribed “It's a Boy/Girl/Baby,” “Congratulations Auntie,” or “We're Pregnant” cake for dessert.

Ask them to go shopping with you and take them to your four-month doctor's or midwife's appointment instead.

If this isn't your first, let your kids spread the news in their own special way.

The old standby — “Guess what?” — works well, too.