The Cheapest and Easiest DIY Dice Rolling Tray – YouTube
When picking a picture frame for this purpose, make sure it is deep enough to retain the dice.
I bought everything at Walmart for less than $7.
Parts List (Amazon)
Picture Frame 4×6 – https://amzn.to/3kbLiEi
Rubber Bumpers – https://amzn.to/3i9lC9O
Craft Foam – https://amzn.to/31hmOAV
Craft Felt – https://amzn.to/2DnzwWO