The fact that we cannot generate true random numbers has interesting implications which are considered in step 4.
pic 1 shows the music and light generator. It is 1.3"x2.3"x.8". It plays music over a two octave range through a built in 1" speaker. A surface mount RGB LED displays a range of colors below the speaker. It runs on a 1.5 volt AAA battery.
Step 1: Music Generator Components
Pic 2 shows the random music generator top of circuit board.
Pic 3 shows the bottom of circuit board
You can see the liberal use of Liquid Tape to reduce the chance of shorting between the components.
1.5 volt to 5 volt voltage converter:
08m Picaxe Microcontroller: http://www.hvwtech.com/
1 inch, 32 ohm speaker, LM-386 amplifier, switch, resistors, capacitors, .1" header sockets, RGB LED: http://www.mouser.com
On-off Switch, Plastic Case-1.3"x2.3"x.8" : http://www.jameco.com/