Heres a project for you! https://build-basic.com/build-a-diy-shadow-box-frame/#.XacuiC2ZN0s

Hi! Maybe this will help

https://www.bobvila.com/articles/diy-shadow-box/

Here's a diy shadow box post.

https://www.hometalk.com/28724406/diy-shadow-box-using-cardboard

DIY Shadow Box Using Cardboard

Here is a tutorial https://www.pinterest.com/pin/128141551883238650

If you'd like a divided shadow box, you can even epicycle a drawer organizer. This is how I made a shadow box for Halloween: https://momhomeguide.com/diy-halloween-shadow-box/

This is a shadow box I made for Christmas: https://momhomeguide.com/diy-christmas-display-box/

This is a really cute way to make a shadow box out of dollar store frames: https://www.youtube.com/watch?v=M4Jh5xCH4qs

This is another cute dollar store shadow box tutorial: https://www.youtube.com/watch?v=Z_gdEHg5VD0