I'm guessing you do mean nappy changing area, given your in the BT3 forum.
I suppose also that changing nappies is all part and parcel of the continuous provision for this age/stage band, having said that a CP with comments such as;
PSE: dignity, well being, eye contact, interaction /building secure relationships, Toilet training, health/ ashing hands etc
CLL; rhymes/songs whilst changing, visual signs, talking/interacting.
PSRN: How much does 'it' weigh? (no, sorry not funny

) Maybe a number mobile to look at whils being changed?
KUW: Interesting things to look at ie: mirrors (grasping at straws here

)
Phys; bodily functions

, self care skills, dressing/undressing
Takes quite a bit of thinking about, to write down what our natural interactions with babies are whilst changing them.
The main focus I would say is PSE and Phys.
Peggy