What you need:
1 Normally open button ( mine was left over after taking apart my "shake n go race car")
3 pieces of wire
1 coin cell battery
1 LED Red 5mm light
2"X 2" piece of cardboard
Step 1: Flip Over Book and Tape on Items
Tape on battery and connect a wire to the LED from battery with wire end under battery.
Tape on button.
Connect the wire from the battery to the button with the wire end on top of battery.
Use last wire to connect button to LED.
I used cardboard folded to help keep the notebook level.
When the button is pushed the light goes off. When the button is released the light goes on.
Great for any student going back to school.