Wagon Wheels

I'm not really sure about this one, but I've seen a photo of me as a baby of, perhaps 2 years old.
On my face is a smearing of chocolate, and in my hand was my favourite treet, a Wagon-Wheel.
I had many Wagon Wheels during my childhood and still remember the taste today.
And, as everyone says, they were much bigger when I was a child than they are today, but apparently this is a myth, Burton's who make the bars maintain that they have always been that size!