Cover your cutting board with wax or parchment paper.
Cut a small piece of clay from the block and roll it to about 1/4" thick.
Brush the wooden cookie press with cornstarch and press the clay into the mold until you feel you have filled all of the space.
Use a rolling pin to gently roll over the back of the mold. This flattens the clay slightly and gives the back of your ornament a nice, smooth finish.
Remove the clay from the mold while there is still an edge on it. This way, it comes out of the mold easily and does not damage the shape of the new ornaments.
Once you have removed the clay, trim the excess off with a small paring knife. Be sure to make quick and clean cuts.
If you have rough edges, you can smooth them with your finger and a small amount of water.
Create a hole at the top of the ornament with a drinking straw, chopstick, or the end of a paintbrush.
Use a dry paintbrush, and you can brush the surfaces of the ornaments with more or less cornstarch to give your ornaments an aged look.
Allow the handmade clay ornaments to dry for several days on a flat surface. Keep them away from windows and the stove to prevent cracking.
Once completely dry, buff them with a dry paper towel to remove some cornstarch and create a more finished look.
Add ribbon or twine to hang.