paper mache glue: Glue -- 3 parts white glue (like Elmer's) to 1 part water. Mix until smooth. OR Flour -- 1 part flour to 5 parts water. Boil the mixture for about 3 minutes and let it cool. OR 1 part flour to 1 part water. Mix until smooth. AND If you add a little salt to the mixture, it will be less likely to get moldy while drying.
Glue for kid's crafts: simply mix 1 cup of flour, 1/3 cup of sugar, 1 1/2 cups of water (you might need a bit more or less) and 1 tsp of vinegar. Then you warm it up on the stove till it thickens a little bit, let it cool and it is ready to use.