Question Expand a toggle widget from clicking on a separate widget

[Rcannon]

I'm trying to find a straightforward way of making specific toggles on my page automatically expand when a separate widget, such as a button or image, is clicked on. This doesn't seem like the trickiest problem but I'm having no luck finding anything on how to do this online. Please help me out if you think you can, I'd really love it if I could add this functionality to my site and based on other searches I'm no alone.

Many thanks,
R