Step 1: Materials
Your materials list is really quite short. You will need the following parts...
Please note that the quantity of each part is in the [ ].
-555 Timer IC 
-100uf Electrolytic Capacitor 
-1.0uf Disk Capacitor (Marked "104") 
-Photo Resistors 
-1K Resistor (colours: Brown, Black, Red, Gold) 
-a Switch 
-9v battery 
-A speaker 
-A IC proto board to keep it all nice and tidy 
-Some machine screws and nuts to hold down the board (optional)