Neat idea from Instructables user Random_Canadian, whose mini metal lathe and homemade plastics extruder we have recently featured.

His take on the classic physics toy uses five glass marbles, each illuminated by an attached LED and suspended by the wires that power it. The LEDs have been ground flat on their tips, and attached with cyanoacrylate glue to small, matching flats ground on the marbles with a rotary tool.