The Postcards for Mom Pranksters

So, I've tried several times today...

...to call Stephanie and let her in on the secret. Her phone's turned off. Humph. I'm taking that as a sign from the universe that today's not the day to spill the beans, so perhaps the universe wants us to do this in a clever way.

From all this, I had an idea. What do you think of each of us - me included - sending a postcard this week with just the words, 'Hey, Steph, it's me behind this whole thing. Surprise!' with no signature and next weekend I'll try again for a big reveal?