Megaphone

I was gifted this old mini-megaphone recently. I was originally thinking of just feeding audio to it through some sort of muffling device to create a lo-fi quality, but then Bad Diode suggested circuit bending, which is something I've been curious about for a long time.

Things I know so far: It works of batteries (6 AA). It currently functions as expected. A few parts show corrosion inside. There seems to be a primary chip in there worth researching.

Will this be my first circuit bending experience? Let's see

The megaphone has a dial-pad for loading up pre-set songs from a list

There's some corrosion from time, I need to be thoughtful about this. It does work however.