No, it's not! Except for the first few, which are nominally edible. Only eat the ones marked edible!

The rest are recipes for non-food items. You know; like play dough. And coal gardens, and so on.

 
Candy Clay (edible)
This is food, but it's clay, too.

10 ounces white chocolate or white candy disks. You could also use regular chocolate, but if you do, disregard the food colouring.
1/3 cup corn syrup
Paste Food Colouring

Slowly melt candy and stir until smooth. Add syrup and blend thoroughly. Add food colouring. Pour out on waxed paper and spread until about 1/2 inch thick.
Cover with waxed paper and allow to stiffen for a few hours. Children can make little animals or flowers. Wash your hands (and your kid's hands, too before shaping!)   
 
Peanut-Butter Play Dough (edible)

3 1/2 cups Creamy Peanut Butter
4 cups powdered sugar
4 cups powdered milk
3 1/2 cups corn syrup

Mix ingredients by hand. Share.
 
Oatmeal Dough (edible)

2 cups smooth peanut butter
2 cups rolled oats
2 cups powdered milk
2/3 cups Honey

Mix ingredients. Store in air-tight container.
 
Yummy Dough (edible)

2 cups honey
3 cups peanut butter
1 cup (or more) powdered milk

Stir all ingredients together until smooth. Add more powdered milk
if desired. Very sticky.
 
Frosting Playdough (edible)

1 can Frosting Mix
1 1/2 cups powdered sugar
1 cup peanut butter(smooth)

Mix together until it reaches desired consistency. 
 
Cloud Dough This is fun stuff- but very greasy!  (non-edible)

1 cup water
1 1/2 c vegetable oil
6 c flour

Add a few drops of food colouring to water. Combine water, oil and flour.
Knead. Add more water if necessary in small amounts until the dough is soft and really, really  stretchy.Use on a washable surface only.
 
Salt Glitter (non-edible)

1/2 cup salt
6-7 drops food coloring

Add food color to salt until desired color is reached. Microwave for a minute or two, or air dry. Store in air-tight container.
 
Sorta not completely unlike Silly Putty (non-edible)

You must use Elmer's School Glue. The stuff you used... in school.
I don't know why, but nothing else works.

2 Cups Elmer's School Glue
1 Cup Liquid Corn Starch

Add starch gradually to glue, mixing with hands.
 
Sand Art (non-edible)

Clean Sand
Tempera Paint
Glue & Paper
or
Glass jars with lids, butter knives, and pencils.

Add tempera paint to sand in a clean bowl. Mix until colour is where you want it. Then: you can either put glue on paper & sprinkle in sand; or you can put the  sand in layers in the jar, pushing it down with the butter knives and pencils to make mountains & valleys.
 
Goo (non-edible)
2 cups of glue
1 1/2 cups Hot water
Small bowl
3 tsp of Borax
1  1/3 cups of Hot water

Combine together all ingredients.  Add food colouring for desired colour (we like our goo blue)  Store in an airtight container.
 
Modelling Clay (non-edible)
4 cups flour
1 cup salt
8 tablespoons salad oil
7 to 8 tablespoons of water
food colouring

Mix all ingredients together well. Keep in sealed container.
 
Bake-able Clay (non-edible)

1 cup salt
1 1/2 cups warm water
4 cups all purpose flour

Dissolve the salt into the water. Cool. Add flour and knead for 8-10 minutes. To  colour, add food colouring before adding the flour.
Shape & bake at 325°  for 30 minutes to one hour (until the moisture is gone, and the piece sounds hollow). Paint when cool. Seal with a non-toxic water based sealer like Mod Podge.

Coal Garden (non-edible)

What's a coal garden? Make one & see. You could use charcoal briquettes if you can't find coal.
INGREDIENTS:
4 lumps of coal, about the size of charcoal briquettes
6 tablespoons salt
6 tablespoons bluing (bluing is found in the laundry section of the grocery store. It's used to make white & light coloured clothing appear brighter.)
6 tablespoons H2O
1 tablespoon of ammonia
liquid food colouring

Wash the coal and place in a shallow dish.  Combine all other ingredients (except food colouring) and pour over the coal. Drop in food colouring as desired. Within three days crystals will grow on the coal, and will be coloured by the food colouring. Neato! .

 
Chalk (non-edible)

1 cup of plaster of Paris
1/2 cup of cold water
Rubber Gloves (the disposable kind, not the fuzzy inside kind)
Powdered Tempera Paint

Mix Plaster of Paris, water and tempera paint. Pour the mixture into the fingers of the gloves. Let harden completely. Remove gloves, and you have chalk!

Even neater: drill a hole in the top of the large half of a plastic Easter egg. Make the hole big enough for the plaster to be poured through. Now, in the bottom part, fill the egg about half full of the plaster mix. Insert a small toy, like a rubber dinosaur or an army man. Then, replace the top part of the egg, hole, and allow to harden. As the chalk wears down, the child will see the cool toy inside. The chalk can be broken to release the prize.  Cool? You betcha!

 
Quick Drying Paint (non-edible)
This dries very quickly, and is washable. What else could you ask for?

1 cup liquid tempera paint
1/4 cup liquid laundry starch
2-3 Tbs. liquid dishwashing or laundry detergent

Mix all, adding water a bit at a time until it is diluted to your taste.
 
Dry-able Clay (non-edible)

3/4 cup flour
1/2 cup salt
1/2 cup cornstarch
 Warm water

Mix the flour, salt and cornstarch in bowl. Slowly add warm water until the mixture becomes hard. Knead, then use to make small items. When dry, paint. Good for making beads and items of jewelry.
 
Kool Aide Play Dough (non-edible)

Smells great & is very colourful
 
1/2 cup salt
2&1/2 cups flour
2 pkg. Kool Aid
3 tbs. oil
2 cups boiling water

Mix dry ingredients. Add oil. Add water and knead. Store in plastic bags in the fridge.
  
Gum for Home-made Stickers  (non-edible)

4 envelopes unflavored gelatine
2 cups water
1 teaspoon peppermint extract

Mix the gelatine and the water together in a pan. Stir over medium heat until gelatine is dissolved, then add peppermint extract, remove from heat and allow to cool Paint a thin layer of glue on the back of any picture and let dry. Lick and ththose puppies will stick!