on Apr 28, 2013:
what if i am getting a double image, i have tried a variety of wattages and box lengths, and distances. Anyone have any idea of what i might be doing wrong?? Also doing my soon to be daughter's nursery.
on Nov 14, 2012:
You can do the same thing using an iPad, a page magnifier, and a cardboard box. You have to have the room fairly dark but my daughter has been using it for her chalkboard sign business very successfully!