A RGB that changes colors (Colours... What are these Americans thinking? All hail the Queen!) with three potentiometers, one for each color (Colour! Blimey!)
So you can mix any of the colors (C O L O U R ! The Queen is not going to be happy!) There are 16 581 375 possible combinations, though they don't all look different but yea... that is a lot of colors... Colors! COLORS! I guess the English guy did himself a favo(u)r and went to have tea and crumpets lol! I don't mean to be racist...

1) Build the schematic
2) Upload the code
3) Print the lamp (The replicator M is preferred to the replicator G)
4) Put it all in a box with holes in it
5) Glue the things in
(Note: There are two Arduino codes in the downloads. The one called "RGB.ino" makes the thing stay on forever and drain your batteries. The one called "rgbfinal.ino" makes there be a button to turn it on and off and a led go on when it is on and off when it is off. i can guarantee "rgbfinal.ino" will work but i'm not completely sure about "RGB.ino" If you want to use "RGB.ino" then when building the schematic, don't put in the button or LED.)