These little trees are exactly what crafts should be: they're cheap and really satisfying to look at. How sweet for the center of a table, your buffet, or an end table. Amongst candles, lights, or ornaments, they would be especially lovely.
I used thin cardboard from a tissue box and a dryer sheet box from the recycling bin, duct tape, green floral tape, pretty tinsel-like yarn with lots of texture, scissors, and a glue gun. Depending on the items in your stash, this project is very nearly free!
First, you'll cut your cardboard into square/rectangle shapes. It doesn't really matter. And they don't have to be perfect. Because you'll be curling those pieces into a cone shape. Use the duct tape to hold that shape together. Then, cut the excess from the bottom so that your cone stands upright.
Next, use your floral tape, wrapping the entire tree. I used a dab of hot glue to hold the starting and finishing ends down. Floral tape just requires a little tugging as you work your way around the tree. The yarn that I used was not all that dense, so without this step pieces of cardboard and duct tape would be seen. Ick. The green of the floral tape is, of course, much nicer peeking through.
And now, we've got them all covered.
Enjoy your beautiful, little trees!