Originally Posted by Billykinz
Thank you both! Right now, we are using Instamorph for the horns. Our theory is if we make it thin enough, the light should successfully come through. My only worry is about the green horns turning red. I'm hoping buying a bright enough light should be okay.
The horns just light up. No fancy color changes or flashes, so I'm guessing the LED's will be just fine. I'll post again with the final result so I can share what works and what doesn't!
If you don't need to change color or animate, EL wire will work too.
You'll have to be careful about the green/red thing. As long as you don't put down something that's TOO green, some red will show through. Use as thin a layer on the surface as you can get away with..