Parts List - All available from Radio Shack

Resistors: 
1  100 ohm 
1 10k ohm 
1 50k ohm pot 
1 1k ohm pot 
Capacitors: 
1 10 mfd electrolytic 
2 0.1 mfd 
Misc: 
1 555 Timer IC 
1 Photocell 
1 Momentary switch (normally closed) 
1 Momentary switch (normally open) 
1 On/off switch 
1 8 Ohm Speaker 
1 1/8" or 1/4" output jack 
2 Knob 
1 9V battery connector 
1 8 pin IC socket 
1 Case