This page seems to have a lot of good tips and recommendations for dyeing your hair in the Manic Panic style colors. It also reviews various dyes and methods (including Kool-Aid) for dyeing your hair.
[QUOTE=Chasing Dreams]
Sweet! I never knew this. I’m going to color my hair all the colors of the rainbow. 
Not all at once of course!
[/QUOTE]
[QUOTE=CanvasShoes]
I seem to remember seeing something somewhere that said that they used Koolaide. If I remember, they use several packets, with very very HOT water and make a paste, then slap it on and leave it for awhile. I’ll bet if you googled Koolaid hair color you’d find the right ratio and “recipe”.
[/QUOTE]
I hope that it doesn’t need to be stated, but if you go this route, buy the unsweetened Koolaide. Nobody digs a swarm of flies.