Postcard with QR code and TinyUrl on the back that takes you or your cell phone to the video below. The kids will love it!
If you want to buy 50,000,000 of them in people's hands in a couple of days, get in touch with Clickable Print New York. when they open for business. Or if you can't wait, get in touch with me at Clickable Print.org (a soon to be 501(c3).