This 4x4x4 cube is interactive by using the top four corner LEDs both as LEDs and as sensors that will react on light. Depending on what LED gets the least light, the cube will run a different show.
Step 1: You will need:
piece of wood
computer with Arduino software
4 resistors that go with the LED's (yes just 4)
some small COAX wire (isolated wire)
Step 2: Making the rig
This plank with 16 holes will be the rig for your soldering.
Step 3: Bending the legs of the LEDs
You can also bend 32 LEDs already if you are on a roll.