Thanks for all the replays, we had already sent the invitations last friday as her birthday is on this saturday, but after talking to the other mum who has no intentions of changing her party even though she only gave out the invitations for their party yesterday, we decided to change ours to avoid conflicts... So we hope that other parents understand and will make a bit of an effort to go to both so no child feels left out... Personaly we always let our kids go to all the parties even if they are on the same weekend but we can understand that some parents might be reluctant to do so. With a bit of luck they'll all have a great weekend!