I did a lot of projects with LEDs. It always amazed me how light is able to just be so darn attracting. In this one I froze some LEDs in ice to create a diffuser. I used the Lego pieces to create the shape. Unfortunately the pieces snapped while removing them from the ice. Someday I may try again.
This was with a shutter delay using a blue flashlight I soldered together. Pretty sweet.
This one was with a function generator attached to an LED Ring we made one a dual clad copper board.