What you need for this project is
1. A laser engraver
3. 1/4 inch of acrylic.
What you are going to do is, take the night light apart, measure the plastic piece that illuminates and discard it.
Using the program that came with your engraver, draw out the coordinates you need and shape.
Put your acrylic sheet in and cut it.
Watch the video to see a visual implementation of these steps.
After the Acrylic piece is cut, you can put whatever you want on the the acrylic. Just make sure to mirror the image and that'll be the back side of the night light.
Thanks for watching!