A room mom brought this as an activity one time to my class. Both the kids and I loved it. It's just a decorated sugar cone. I've prepared some reasons why these sugar cone Christmas trees are awesome and why kid, teacher, and parent were happy.

Easy
You just frost a cone and add candy on top. No pre-assembly is required. No milk cartons need to be collected. Frost it. Add some candy. That's that.

Not too messy
A gingerbread house makes graham cracker crumbs. A sugar cone doesn't.

No tears
My graham cracker gingerbread houses almost always fall apart. When you're 6, that's a devastating blow. It topples on the way to the car. All that hard work for nothing. A Christmas tree is easier to keep together and hold so that it doesn't fall.

Yummy
A sugar cone doesn't go stale as fast as graham cracker.

Optional Toppings
M and Ms
Licorice (for light strings)
Nerds
Coconut
Sprinkles
Gum drops
Red hots
Chocolate chips
Cherry chan candies
Mini chewy sweethearts
Jelly beans

The trees shown below are more decorative. Use a leaf cake tip to look it look more like a pine.

Image 1:
https://anordinarymom.files.wordpress.com/2011/12/christmas-tree-sugar-cones.png

Image 2:
https://4.bp.blogspot.com/-i1xfGwk-Ro4/TvPJjM5kohI/AAAAAAAAAQs/FlisI3_z8WM/s1600/IMG_1003.JPG

Image 3:
https://hostedmedia.reimanpub.com/TOH/Images/Photos/37/exps21667_QC10364D40.jpg