I am wanting to make a rainbow slide on the carebear cake I am doing what would dry the quikest Fondant, royal, or colorflow? The part is Saturday what would you recommend using?

I don;t know which would dry the quickest, but if you do any of those now, it should dry by saturday.
Don't put it in an airtight container, because it won't dry if you do.

I think colorflow or Royal would dry the fastest...

I never worked with gumpaste is it easy? Is it like the other? Was recommended in another thread.

Rather than gumpaste, you can just add some gum-tex to your fondant and it will dry quite well and stronger than just fondant.

okay gave up on slide! Bought some colored fondant and made a simple rainbow to put on top!