The whole point of the forum is to share projects, but it’s not always obvious to see how to search for them.
In the advanced search options, try searching for acrylic in the “made on a glowforge” category. Like this:
https://community.glowforge.com/search?q=acrylic%20%23glowforge-project-examples%20in%3Afirst
It is also sometimes called plexiglass, perspex, or even PMMA.
https://community.glowforge.com/search?q=plexiglass%20%23glowforge-project-examples%20in%3Afirst
(there were no results for PMMA, which I was a little boooo about.)
As for where to get some acrylic (no doubt your next question), check out #1a: