My mother, on widowhood, starting visiting a primary school in Inner London and the pleasure she received was immense.
Taking a train and the tube from aged 70, she 'retired' only at the age of 85, when she felt that her frailty made her potential liability in the bustle of busy corridors.
She helped with reading, the library and craft sessions. She was called on annually to give her talk on 'Life as an Evacuee during WW2' and became wardrobe mistress for the school productions.
The children (and staff!) loved her to bits. Mums would come up to her at the school gates full of gratitude. I went with her once, to hear her greeted by 'ooh, I like yer 'at, Miss' and 'is this your big girl, Miss?'😳.
She always went home feeling as if she had really made a contribution to the children's lives, laden often with home-made Easter, Christmas and 'thank you' cards (and enjoying a 'lovely' (sic) hot lunch!).
She was nominated for, and received, the BEM for services to the community and three members of staff attended her funeral.
A highly recommended rôle!