Google have sent me a £50 gift card

[KatyMac]

To use on 'adwords'

As a tiny local childcare setting is there any point doing anything with it

(If so what should I do?)

If they are image files, then some software will read the camera data if that exists and thus show you the date the image was taken. That may help to restructure things.
If using MS Vista... you can right click on a picture file, select Properties then Details to show the camera data.

If there are many images, then software like Exif Sorter may be of help. Note: I've not used this software.
REMEMBER: Make a backup of all those files you recovered, before you do any sorting using software... so you don't lose the files again.