You'll be able to see how to make an ear either for a puppet or for a mask or whatever.
These are made with an air dry water based dough for kids.
Don't forget to work with a drawing or a picture of a real ear next to you.
In order to have a good looking pair I advise you to work on both at the same time and always apart from the head so that you'll be able to see them both side by side.
Step 1: Laying down the dough
On that MDF you've already drawn a rough ear pattern with a 6B pencil. A soft pencil as a 6B will works better.
The humidity of the dough will catch the pencil pattern. If you're using a pen you should wet the MDF a little bit more to help the transfer process.
Having the pattern on the dough you just need to cut it. A water wetted thin blade will cut better.