Secret Door Card

I recently discovered a new blog by Dawn Olchefske and the only thing I can say is AMAZING!!!  She has so many wonderful cards and even has tutorials for the more difficult ones.  One of the cards I fell in love with was called a Secret Door Card.  I had to watch her video twice to make sure I got everything right.  Here is a link to her blog with the video:  http://dostamping.typepad.com/dostamping_with_dawn/2010/08/video-secret-door-technique-meets-cottage-garden.html

My version is not nearly as cute as hers, but it was fun to make.  I made it for my 4 neices who (according to my sister) are just brilliant.  We'll see if they can figure it out.  My hubby couldn't figure it out without trying to take it completely apart!  Here is the front:

I left the front panel blank because I'm not sure what the sentiment will say.  Ok, here's the inside:

It says, "Can you find the secret message?"  If they can figure out the secret fold, here's what they'll see:

How cool is that?  I can't begin to explain how this card works, you'll have to go to Dawn's blog.  Her video is so easy to follow. 

Thanks so much, Dawn, for the inspiration and for letting me post.