This is a lithophane night light that makes a cool gift.
In order to build this you need to purchase
This light kit from amazon https://www.amazon.com/dp/B07DC5MG4F/ref=psdc_371518011_t2_B06XK2LMZB
it comes with a remote control.
then open your favorite pictures in a photo editing software and resize them to 98X98 mm.
Make sure they are in mm. you can choose to covert them to black and white if you wish. Once your photos have been resized go to the following webpage
Drag your photos into the page and then adjust the settings as you would like. Once you have done that download the stl file to load into your printer.
sometimes these parts fit pretty tight you may need to use a sharp knife to clean up the prints so they will fit