Many many years ago, I was into ceramics. Christmas stuff, mainly, and sold them at craft fairs. Back then we were on a pretty tight budget, so I made a lot of my Christmas gifts. One year I made trees for both my mother and MIL, like this:
only with a fancy base that looked like wrapped packages and toys. I personalized them with the package tags having names of their kids and grandkids as well as Mom/Dad MIL/ FIL themselves. The "lights" are clear plastic; what you are seeing as glowing bulbs is light shining through
them from an ordinary light bulb inside the tree. Mom was thrilled with hers and still displays it every year as her Xmas tree; MIL was decidedly underwhelmed.
(Handcrafted items were only so much second-rate junk to her.)
"So just how do I replace one of those little lights when they burn out?" she snapped. I explained that they couldn't
burn out, because they didn't have electricity going through them. I took the tree off its base and showed her the light bulb inside. I showed her the posts of the little lights inside, how there were no wires running to them, and explained how they are glued into the tree. DH and FIL both tried to explain.
Nope, she wasn't having any of it. Those lights were going to burn out, I was refusing to tell her how to replace them and she'd have to just throw the whole tree away in a year or two because it wouldn't light anymore.
And I guess she did, because I never saw her display it, and it wasn't in the things that we cleared out of the house when they moved to Assisted Living.