Cover the foam cone with plastic wrap. Drain the olives.

Cut your toothpicks in half if you want tiny sticks to pull the olives off the tree, or leave the toothpicks whole if desired. Push toothpicks through olives. 

Cut your cheese pieces into desired shapes with small 1" canape cutters or cut freehand. Make a star for the top of your tree. Cover with plastic wrap until ready to use. 

Attach the olives onto the foam cone with the toothpicks in a spiral design, starting from the bottom of the tree and working your way up to the top. Fill in the gaps with more olives and cheese slices using more toothpicks. Place the star on the top. 

Cover the finished olive and cheese tree with plastic wrap to keep it from drying out. Refrigerate until serving.