I took the brain from https://www.thingiverse.com/thing:620846 and scaled it down by 50%. I then cut out an area in each half for the RGB LEDs to sit. The magnets need to be melted in still but remember magnets lose their strength to extreme heat. The LEDs run down the center of the stand and come out the back, then connect to the Arduino Uno. I used hot glue to secure the bulbs and wires along the bottom of the stand. You could probably use two regular LED bulbs with just batteries if you want to bypass the Arduino.

Supplies
1x 3D Printed Brain Left Half
1x 3D Printed Brain Right Half
1x 3D Printed Stand
1x 3D Printed Stand Pole
1x Arduino or Elegoo Uno (Or another power source for LEDs)
2x RGB LEDs (or one color LEDs)
3x 110 ohm resistors (1x per color)

The brain was printed at 5% infill .12 layer height with 2mm supports for easy removal
The stand was printed 20% infill .28 layer height with supports only touching the build plate. Both pieces were printed in PLA

As far as put together I think it's pretty self explanatory, but please feel free to reach out and I can make instructions. This is a great beginner project if you have not used an Arduino before.

Note: The brain itself takes about 24 hours to print