Hubble Bubble Granny Trouble is a delightful look at a very alternative type of granny! She's different because she's a witch and this causes all sorts of unusual scenarios! Her granddaughter eventually decides that it might be easier if her granny were to fit it and be a little more normal. But the granny gets quite depressed and finds it very boring so the little girl quickly realises that it's much more fun when her granny is just being herself.
I don't know if it's just me but I don't think that the problem that this book potentially identifies is really a problem for the age group that the book is addressed at. My girls are not bothered at the moment by differences - as far as I can tell and would probably love to have a witch as a granny, as well as keeping their current ones! Maybe as my five year old moves more firmly into school and her relationships with her peers develop this might be something that is more of an issue. Of course it might come in handy in a more subtle way as well, a difference that isn't a witch as a granny for instance! I'll keep you posted (and this book handy!).
However, both my girls really enjoy this book and the rhyming text is lovely to read aloud. The illustrations are great, lots to look at and lovely use of colour. It's one of those great books which we can all read together!