I've made this miniature tree by bending a wire around and around and splitting them and more turning for a couple of hours. (Which I learned from Mel the Terrain Tutor on YouTube) I made a base with air drying clay and then I covered the tree in thick modpodge and a bit of brown paint to make it look like an actual tree (next time I will first spray paint the tree black so it's easier to cover the metal colour of the wire). And lastly I used about 4 coats of 3 colours of green foliage as leaves (check out the other tutorials by the Terrain Tutor for more info on that)
This tree will be used to cover up the back of the micro miniature 1:144th scale dollhouse, you can see why in the picture below ;).