Just stumbled across this while digging around on ebay:

World’s Largest Lite-Brite -DaVinci’s “The Last Supper”

The pegged image itself measures approximately 4’9″ tall by 9’9″ wide and is comprised of exactly 124,418 brand new, original Lite-Brite pegs. After running out of clear/white pegs from my initial bulk peg order from Hasbro, I had to buy out the entire Lite-Brite stock of every Toys-R-Us, Wal*Mart, and Target in a 15 mile radius several times over just to replenish the shortage of pegs in that color.

An actual Lite-Brite toy has a black background which utilizes blank spaces as “black”, but does not have actual black pegs. For artistic and Guinness certification purposes, I was unable to leave blank spaces. What to do? Unused pegs were painted black with several layers of a special glossy paint made specifically for plastics. The result is a strong-bonded paint that doesn’t chip or flake in the slightest.

The pegs are fixed to the “canvas” with 8 layers of glue. Not just any glue, but non-fogging cyano-acrylate (the most expensive and hard-to-find of the super glues). This non-fogging glue was chosen for its unequaled bonding strength and the fact that it wouldn’t discolor the pegs, inhibiting light transmission.

Buy it now for $5000.