Line a baking sheet with parchment paper. Lay the pretzel sticks on the parchment paper, leaving plenty of space between them.
In a small saucepan, melt the chocolate chips over low heat. Stir until the chocolate is smooth.
Use a tablespoon to scoop up some of the chocolate and allow it to slowly drizzle off the spoon as you move it back and forth across a pretzel stick to make a tree. Repeat for the remaining pretzel sticks.
You can also use the plastic bag piping method and pipe the chocolate over the pretzel sticks to create trees. You can sprinkle on decorative sprinkles while the chocolate is still soft if you want.
Place the baking sheet in the freezer to allow the chocolate to harden. Once hardened, the pretzel trees can be stored at room temperature.