Electronic – dimming led with photoresistor

Suppose that you have a divider like the one below and the DC source is the AC signal (using DC helps with the simulator)

^{simulate this circuit – Schematic created using CircuitLab}

If the photo-resistor is in place of R1 then the output behaves like shown below and the output voltage increases as the resistance lowers (more light)

if the photo-resistor is in place of R2 then the output behaves like shown below and the output decreases when the resistance lowers (more light)

In both graphs the vertical axis is the output voltage and the horizontal axis is the resistance value (starting from left side and increasing to the right)

OK rather than continuing comments I'll answer here.
For kids only five years old this will be a bit much I think.
I'd start with just batteries and light bulbs... How do you make the light turn on?
You can then do some series and parallel stuff. But even that may be over the top for some.. maybe best to just let them play around.. (How many different can you get a light bulb to turn on.) If you wanted you could add some LED's to the mix. (Maybe with the current limiting resistor soldered onto on leg and covered with heat shrink.) I can think of lots of fun things... but again may not when they are only 5. (A red and a green/blue LED in parallel would be interesting.)