Grab a medium sized mixing bowl and pour in your flour.
Now pour in your warm water and start stirring to combine the ingredients together. Stir until your mixture is nice and smooth.
Store in an airtight container. I already had mine in my house, but our storage container is a lot like these on amazon.
When ready to use just dip your paintbrush into the glue and use it on paper, woods, metals and anything else. Be sure to store your left overs in the fridge until next use.