I printed all components using a Lulzbot mini. I had to reduce the size to .97 in Cura to get it to fit.
I printed the brain halves using clear 3mm ABS I got on Amazon.
I printed the base and supports using 3 mm black ABS.
For the LED's, I used 5 mm RGB slow rotating LED's. I have three LED's wired to the AAA cell battery pack. I did not use resistors. The LED's will stay on for about 4 days continuously without a battery change.
The LED's were purchased at Amazon.
The rocker switch for the base was also purchased at Amazon.
As always, I sprayed the black ABS with a coat of satin lacquer. Lacquer dries within 5 minutes and leaves a nice sheen on the ABS.