I suppose it does get difficult coming up with pairs ..
big girl doesn't have to take a nap in the afternoon
little girl tends to fall asleep .. and has accidents
big girl gets to use a bowl and a grown up spoon
little girl hasn't quite got the hand to mouth co-ordination yet
big girl is allowed to use the potty
little girl cant always get butons or zips or door handles to work
big is allowed to use a sippy cup.
little girl finds big drinks just go right through her
big girl can now spell her name and color in properly
ilttle girl knows her name is <insert name here..>
hope that helps or fuels the imagination