With a sharp knife, cut the watermelon quarter into 1-inch thick slices.
Cut a slice in half. For each half, make two vertical cuts about an inch through the rind and cut away the rind on each side to make the trunk.
For a larger tree, use a Christmas tree cookie cutter to cut a tree shape from a watermelon wedge.
Yield: 12 Watermelon Christmas Trees (See Tip 1)
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Tips/Notes
The number of trees that you will be able to make depends on the size of the watermelon and how many trees are made using a cookie cutter and how many are made using half a wedge.