Back in the dark ages - well, nearly 12 years ago when I was preparing to meet my elder child - I used a Tomy talking photo album, on the strong recommendation of experienced posters here.
I don’t know if such a thing exists anymore but basically it was a child-friendly, sturdy plastic photo album in primary colours in which you could slot photos AND record a message for each page. The beauty of this was that my daughter recognised my voice as well as my face the first time I met her at her foster carers’ home.
The easy-flip album also lit up and made silly noises each time the page was turned. So it doubled as an interactive toy as well as an information tool. This meant that the foster carers could leave the album within reach of my daughter (then a baby) to engage with on her own terms rather than formally sitting down with her to ‘read’ her a book about her new mummy.
It still works perfectly after all this time - after a few squillion battery changes!