I think key caps are more beautiful on a keyboard.
More
Not exactly computer keyboard...
(http://www.synthparts.com/wall3.jpg)
But if you have more key caps than you can fit on your keyboards... perhaps these?
(https://ae01.alicdn.com/kf/HTB12jcdNVXXXXapXFXXq6xXFXXXy/220105582/HTB12jcdNVXXXXapXFXXq6xXFXXXy.jpg)
https://www.aliexpress.com/item/Free-Shipping-Brand-New-108-key-mechanical-keyboard-Keycap-Storage-board-Keycap-sort-out-Tool-for/32578535082.html
https://www.aliexpress.com/item/Mechanical-Keyboard-Keycaps-Holder-Key-Cap-Storage-Board-Keycap-Placement-Tool-108-Keys-For-MX-Switch/32757009777.html
Or
(http://netdna.walyou.netdna-cdn.com/wp-content/uploads/2009/11/Key-Promises-2.jpg)