Hey there Pink,
Does she like milkshakes? a banana and honey smoothie maybe right up her street, or banana with a splash of cholate syrup in it? add yoghurt too for her dairy intake....
Also strawberry and banana is anothere sweet one.
Another trick? get a mcdonalds empty drinks carton from them that they put the milkshakes in and put the fruit smoothy in it.....
You can also do an ovaltine style smoothy for a malty flavour...... I wouldn't let her see you're preparing the smoothies till she says yum!!! does she like to bake cakes with you? again... good ol' banana loaf, she can happily squish up the nananas!!!! see here for smoothies...
http://www.flowercarole.co.uk/
B xXx