I bought two stickers from Red Bubble, which are designed to put in the car with a number of details of your child so that emergency personnel can know about allergies or medical conditions etc if you are involved in an accident. Seemed like a great idea, until the stickers arrived and they are so small you can barely write anything in the boxes... seriously, they are tiny. I had enough room to write the first line of my address and my name but not any contact details... so pretty much useless and they cost almost £5...