We just learned about the colors in 
ROY G BIV.
You probably already know this, but 
True is a way of saying Yes.
and 
False is the opposite and means No.
A fancy word for 
True and 
False is 
Boolean
named after the famous mathemetician 
George Boole.
In computers and electronics, it's kind of like you're looking at a 
light bulb.
If the light bulb is 
ON, you can call that 
True or Yes or even the number 1.
Is the light bulb is 
OFF, you can call it 
False or No or the number 0.

(from: wikipedia - 
light bulb)
Inside computers the electricity that runs the computer has thousands
or even millions of little ones and zeroes, meaning 
True and 
False.
These little light bulbs are what make the pictures on your computer screen
and the light switches come from things like your keyboard and mouse.
You can imagine a room just filled with light bulbs and light switches,
and that's exactly what some of the oldest computers (like the 
ENIAC) looked like!

(from: wikipedia - 
eniac)