I just took one of my little ones on an outing and photographed her at every turn... then when I got back put all the photos into Word, made them smaller and put some simple text by the side. I've presented it in a cheapie file from tesco and she was absolutely delighted - 'it's me! look dad' Took a bit of time but worth it for the smile!
I believe Ofsted are quite keen on photo diaries as well!!!!
Sarah x
www.mychildminder.tk