Vote for it for the Let It Glow contest!
Step 1: What you need
2. Plastic water bottles (0.5L) - thinner plastic = better for this project
3. Spray paint/acryllic paint
4. Painter's tape
5. Red LEDs - 20mA at 3V
6. Battery holder + 3 AA batteries
8. Solder and soldering Iron,
9. Wire cutter
10. Super Glue
11. Some pointy tool to punch holes.