The sign in 12" wide by 24" tall and is made out of 3/4" plywood. It was made on a VersaLaser cutter/engraver. I sanded the wood and then painted it all black with basic cheap latex paint (that I've been using a ton of for this year). I then used the laser to burn off the paint to form the letters (and also slightly engrave the wood in the process). I could also do the reverse (burn off everything but the letters) but I thought this looked good and it took less time to run. I'm using thin MDF for the A-frame sign so it'll be interesting to see how the finished product looks on wood with no grain. I expect it won't be quite as interesting but since it'll be viewed at a much greater distance I don't think it'll matter.
I was thinking of creating a sign to prevent the use of flashlights. The main problem is that adults use flashlights to show their little ones who's who and how effects are done so that they're not so scared. I understand that, but they shine it into my eyes and the eyes of any other actor there. It's a hazard for us because we're blinded with light, then our eyes are no longer adjusted to the low lighting. We can trip over things, stumble, damage props and/or settings, etcetera. This is a recent thing that started happening last year. The funny thing is that the kids are no less scared when they see there's nothing to be scared of.