Drawing with chalk is something our girls always like to do. They also like to grate the chalk and serve it as "soups" and "flour" and other delicious meals... best mixed with mud ;o)
We found an old blackboard some days ago and had no chalk left. But we had some spackling paste (plastering... in Hebrew called "שפכטל", in German "Spachtelmasse") at home and so I decided that we can make chalk by our self as I used to do as a kid too.
You need spackling paste (I read posts where they use "plaster of paris" I am not sure but think it is almost the same) and water.
We used food colours, but you could use tempera too.
For frames we used toilet paper rolls and sealed them on one end with tape.
|mixing the powder and the water until it is a paste, add coulour if wanted|
|fill the paste into the frames|
|set aside to dry for one or two days, take off the frames and let dry another 1-2 days|