A old USB cable, few resister and after a few days/weeks this clear silicone blob finally lost its smell and I put in 2 slow changing RGB LEDs from superbrightleds.com
It made a nice ambient light that is not to bright to run at night and a very odd conversation piece.
Instead of making a new instructible. Here is a little video of it.
Didn't realize that the LEDs flicker guess they use pulse with modulation.