this is so cute! good for you.
one thing I did with my son when he was 4 was take him out for a fancy dinner. He wore a suit and me a fancy dress, I gave him the money to pay for it, so he felt like the man. After we played a round of mini golf and went to the movies...of course it was a kid one. It was so nice.
Maybe get mom to dress her up all pretty buy her a flower when you get her, take her to the park for a picnic. later maybe take her to a pool and go swimming followed by an ice cream to end the night.
I'm excited for you! hope you have a good night with your little lady