The stuffed bunny on the shelf is Jinguu's artist avatar.

I recently got this costume for Nonna in Great Tankery Operation.
https://static.wikia.nocookie.net/gup/images/c/c9/NonnaChildCare.jpg/revision/latest?cb=20180607200836
(The plaid pattern was probably too much of a pain to replicate though.)

HawkeyeNFO said:

I recently got this costume for Nonna in Great Tankery Operation.
...
(The plaid pattern was probably too much of a pain to replicate though.)

Ah, good catch. I didn't even think to check. I'll have to check through all of those costumes some time to see if there are any others that I have missed.

Reference:

Nonna's Great Tankery Operation occupation costume.
[image link; source: GuP Wikia]

BrokenEagle98 said:

Ah, good catch. I didn't even think to check. I'll have to check through all of those costumes some time to see if there are any others that I have missed.

No problem; I might not have noticed if I hadn't seen it in the game. I just happen to be good at remembering visual stuff like that.