I used this recipe.
I let Ian & Aaron each have a sauce pot on the stove to which they added the ingredients we measured together.
Then I stirred them with the heat on until it was done.
I dumped it out onto parchment paper on the table and kneaded it until it was cool enough for the kids to handle.
And then they played and played.
For the record, I found the link for the playdough recipe at this awesome website.
Also for the record, I know we need to change our table cloth. And that we're still in our pajamas at 11am.