Use a 2:1:1 ratio for the ingredients (flour:salt:warm water). So for each cup of flour, use 1/2 cup of salt and a 1/2 cup of water. I wanted to make a few colors, so I did smaller portions. Mix up the flour and the salt.
Add food coloring to warm water, about 6-10 drops depending on how bright you want it to be.
Mix it up, and knead by hand. After doing yellow, blue and green, I had no food dyes on my hands. Sweet!
I portioned it out for T and JT so that each had a sample of each color and then I rolled it flat onto parchment paper and sealed it with plastic wrap until we were ready.
Gather up some cookie cutters and have fun!
They had a blast!