This is something I designed for the Music merit Badge in scouting. I did not design something for this but you scrape the back of it with something to make the croaking sound (I find a sharpie works well).

The only place that really needs supports is the front where there is a big overhang. Don't support anywhere else or it will be hard to remove them from the frogs mouth.

print with whatever settings you normally use

I printed with PLA on 20% infill and 0.2 mm layer height