Hi sb34, have you heard of the Children's Traffic Club? We were sent info about joining by Croydon Council. They send you 6 books full of interesting pictures to talk about, stories to read and activities to do. They have a website - www.TrafficClub.org .
I know how just you feel as I had a fright with ds recently - he was walking up our street with my Mother and I - I'd forgotten something and turned back to the house, when I got back to them my Mother was white and said he'd legged it up the road and took no notice of her shouting at him, she couldn't keep up with him and he ran straight over the road at the top and the next road too. I shudder now at the thought ...