Memorial for boyfriends mother’s ashes?

So me and my boyfriend started dating almost 2 months ago. He lost his mother 3 years ago from a drug overdose and he is still very sadden by it. I don’t know what I would do if I lost my mother when I was young too. They had a very tight and close bond. He has her ashes in a little bullet. He used to keep it on a necklace and wear it but he doesn’t do that much now and he keeps her at home in the cabinet. I wanted to make him a little memorial thing. Maybe a box to put her ashes in or maybe a shadow box or a thing to hang on the wall to put her on or in. Does anyone have any ideas? I’m not very craftsy but I definitely want to do this for him.