These are a great idea. Rather than trying to find the notes application on my mobile, when someone gives me their details, I can just hand them a Mummy Card. They are printed both sides and have details about you, your kids, their allergies or dates of birth – anything you want really and they can even custom design. I could attach a card to each form I get for daytrips with daycare or when they request an update of details every term. They cost AU$80 for 100 or the kids version is AU$50 for 50 through paypal and they ship internationally. The peacock card is my favourite – gorgeous green back. Take a look at their range right here.