Slarch (resembles Gak)

1/2 cup white school glue
1/4 cup Liquid Sta-Flo Starch*
Food coloring

Mix glue, starch and food coloring in a small disposable plastic container and stir. Knead on a paper-covered surface until smooth. This takes a while. If mixture is too sticky, add 1 teaspoons of starch. If it is too stringy, add 1/2 teaspoon glue.

This will only work the day it's made, it can't be stored, it liquifies.