visual + aural in one word

I suggest the word audiovisual. Lexico has

audiovisual
_ADJECTIVE

Using both sight and sound, typically in the form of images and recorded speech or music.
learners can be encouraged to use audiovisual aids

The first sentence doesn't work very well just copying this into the blank, so that would need to be rephrased.

The second sentence could be expanded into something like:

Today in school we shared an audiovisual story.