Easter Peep with internal squeeker. The squeeker can be found on Amazon. Just pause the printer, put the squeeker inside and resume print.
Print is done in Sainsmart pastel TPU with fuzzy skin set, but any TPU will work.
Squeeker:
https://www.amazon.com/Replacement-Squeakers-Downtown-Pet-Supply/dp/B002VXF3WE/ref=sr_1_5?crid=3OR3VAS72GYOE&keywords=2+inch+squeaker&qid=1650231754&sprefix=2+inch+squeaker%2Caps%2C102&sr=8-5
The author marked this model as their own original creation.