My son recognizes Caps Lock and Num Lock LED on my keyboard
My son Michal
(1 year, 5 months) is able to press Num Lock key
when I point my finger to Num Lock LED on the keyboard and Caps Lock when I point to Caps Lock LED!
Scroll Lock LED doesn't work in X, so maybe next week, I'll switch into text mode to teach Michal
all LEDs ;-)
... and no, my keyboard still isn't Genius SlimStar