I made myself a computer including totally-not-a-stool pull out keyboard and totally-not-a-flower-vase speakers. The rest of it is a storm strongbox, manor music stand and eorzean map.

I'm at a loss for mice though, no tabletop item is similar or small enough, so your best bet would probably be to find something that fits under the table and clips slightly through the top (something like the stuffed moogle with the pom sticking out for example).