This may be too late for Halloween this year, but with so many children coming right to your door, it would be cool to hand them a little DNotes "treat" with a brief description. I'm pretty sure a paper wallet would get tossed, but a promo code to claim the DNotes when they registered at the Vault should work. A brief explantaion of what a CRISP is may get the parent's attention. Attaching a couple of candies to it should get the kid's attention.

Next year??
Note: If you put it in a bag with the candy, you can tell the kids there is digital money in the bag!