How to use Plasticine
Montessori classrooms use plasticine clay for muscle development for the hands and arms. It’s also used to make Montessori landforms in small containers. Plasticine is sometimes very difficult to manipulate. I found by microwaving the plasticine clay for a few seconds it becomes pliable. You can even use your microwave defrost setting to make sure you don’t over heat the clay.
Here is a “how to video” to make Montessori landforms using clay.