Tricks for making the very best Gak...
Step one: Mix 1C. glue with 3/4 C. water. Mix it very well. Then add a few drops of food coloring. Any color is good for Gak.
Next mix 1 T. of Borax in 1/2 C. HOT water. Make sure it is dissolved if you want nice and smooth Gak.
Then add the Borax mixture to the glue mixture all at once and stir. The Gak will start to form immediately.
Kooy used Elmer's school glue and got monster brains.