You will need:
A clear Jar with lid
Small piece of the end of a pine tree branch
Rolling pin
Glue
Play dough
Glitter, small bulbs or pretty things to decorate your tree with like ribbon, a small string of beads, and other pretty decorations.

Instructions:
Use the rolling pin to roll out the play dough. Cut the play dough using the mouth of the jar.  Stick end of a small pine tree branch into the dough. Leave lid off and dry over night.

When the play dough is dry, screw the lid on.