Allergy-Safe Playdough

one with just lavender essential oil and one with blueberries (only did this experiment once)

This is how we make our playdough.  Original recipe found here

What you need:

500 grams baking soda
200 grams corn startch
380 grams water
30 grams olive oil (when I made with EVOO, turned rancid faster)
1 tsp cream of tarter
coloring of choice, or glitter
scent of choice, I add lavender essential oil

What to do:  

Add all ingredients, except cream of tarter (and except add-ins until end). 
Once it's stirring, add in the tarter.
Set 8 minutes, speed 3, 80 degrees.
Set 1 minute, 90 degrees.
It will still be loose, it will firm up as it cools. If you want a firmer dough, cook the whole recipe 8 minutes, 90 degrees.
Tip out, let cool, store in tightly sealed container