Light things up with Luminodot
The Luminodot, made by Bandai, is basically a 70x50 cm rectangle box on which you can place illuminating pegs. Choose to make different shapes and forms and create an artwork, with the use of a maximum of 3,500 pegs in 12 different colors lighted up by the Luminodot LED backlight.

The Luminodot is only available in Japan, and there is no notice about future releases in outside countries. If you do want one, you probably have to import the Luminodot from Japan. Luminodot has a price tag of 100 dollar.