I would like to present a tree made from 15 white warm LEDs, winding wire and powered from USB. Each LED is soldered to two winding wires and protected by white heat-shrink tubing. I used this wires with LEDs it to form branches and trunk of tree. All LEDs are connected parallel and have a proper resistors to limit current for each. Tree trunk was putted to aluminum case from taken from candle and glued with hot-melt. It is really simple construction but final effect it is quite nice.
Here is short video presentation: