We have to go and get DD's first US passport in a couple of weeks (she's 6 months old). I'm debating whether to take DS (3.5) as well and have a bit of a day out afterwards. However, I can't remember from last time how long the embassy appointment took. I don't want DS to get grumpy if we are there ages (considering it will be a long day out getting the train there etc as well.) Does anyone know?