General: -These 3D printed parts -Battery pack (I used a total of 5 AAs wired together) -Battery cable -Elastic strap and safety pins For less-complicated electronics: -28 blue LEDs -resistors to limit current (such as 14 50 ohm resistors - 2 LEDs per resistor, or there are other configurations) For more-complicated electronics: -28 blue LEDs -14 50 ohm resistors -2 MOSFETs (one to control the bank of 16 outer LEDs, one for the middle bank of 8 - the inner 4 were powered directly from the microcontroller) -PIC16F629 microcontroller -22 uF 16V capacitor on the input power