1. Melt the chocolate in a bowl in the microwave, 30 seconds at a time, stirring in between.
2. Spoon the chocolate into the bag and snip off a small corner.
3. Lay the pretzel sticks on parchment paper with space between them.
4. Pipe chocolate straight onto the stick, in lines going back and forth from side to side. Start with long lines and make them shorter up to a point, so it makes a Christmas tree. Leave one end of the stick bare: that's the trunk.
5. Decorate with candies while the chocolate is still soft.
6. Chill for about 15 minutes, then gently peel them off the paper.