How to make your own "Gak"

I'd never heard of Gak before (I guess because I don't watch Nickelodeon), but it looks like a lot of fun.  It's basically liquid starch + Elmer's glue + food coloring. 

Full instructions (with big pictures) are at Make It And Love It.  Found by KMOM14, who posted it on Neatorama's Upcoming Queue.