I was looking for a rucksack for my son starting playgroup and came across the pacapod. I love this bag and it is perfect for his medication as it has lots of compartments so I have separate ones for his epi pen and piraton. I laminated an emergency treatment plan which we got from our allergy nurse which stays in his bag at all times and there is a pocket at the front for a photo which is ideal to display his allergy card and picture.
It comes in a selection of colours and animal prints with cute ears, very distinctive which is good as I need to identify and gain access to his bag at all times. There is also a detachable safety strap for when you are out and about with little one. We never leave home without it! £24.95 from http://www.pacapod.com/pic-mix/changer-toy-pod.html