Grace's 1st birthday is less than two weeks away now eeek!

At Christmas while Isabelle loved her toys Grace was asleep when she was opening them - so when Grace woke up and opened hers Isabelle wanted to play with Grace's toys... It was easily resolved as she had lots of presents of her own to play with and be distracted by...
I can forsee problems on Grace's birthday though as she'll want to play with all of Grace's toys and to a certain extent this is ok but they are for Grace not for her and her birthday is only a few weeks later...
I don't really want to go getting Isabelle a present however small as
a) it's quite close to her birthday
b) it's Grace's birthday not hers!
We do plan to get her involved choosing Grace's present, wrapping it, etc and obviously will be planning her birthday and writing a list with her asking her if she wants a party etc...
Ideas / thoughts please!