Three Christmas Trees with LED string decoration

Based on the original model of Obecovský
https://www.printables.com/model/91306-christmas-tree-led-candle

I added a small hole 4mm behind the middle tree and made room to put the 3xAA battery pack of a led string. The leds can be hotglued to the middle tree to get the effect as seen in the picture. 

Since I already printed the original trees I made an addition with only the battery pack as well, which can be glued underneeth the original design. Then al that is needed is to drill a hole behind the middle tree insert.