Simply brilliant, brilliantly simple!

good show!:D

man those thangs r oldies

Yes, it's very nice and all, but does the lightbulb burn out every other day just like the real ones? =D

Simple, yet so effective!

Very intuitive! I remember these from my school days, which was ages ago. Ish.

VERY NICE! :D

Great little MOC!

An original idea, cleverly & simply made, that looks good too. I remember using these but it's all digital and Powerpoint nowadays. Everyone expects animations and videos, whereas two different colours of pen used to be high-tec! :)