I've mentioned this incident on GN on an earlier thread about tattoos before...
When GD was about 4 years old, we went into a McDonald's after going to the cinema. We joined a long table that had a large group of rather noisy young men sat there. They were all covered in tattoos and, to be honest, looked a bit intimidating. GD kept looking at them, silently watching. One of the young men saw her looking at his tattooed arms and he stretched his arm across the table and asked her if she would like to look at "the pictures" close up. GD was fascinated. He talked to her about them, how they were done and how they wouldn't "rub off when he washed them". The other young men, not to be outdone, did the same and soon GD and I were surrounded by several outstretched arms, whilst they explained what each tattoo meant, why some were monochrome and others were coloured, how long they took to do and how much they cost and whether it had hurt having it done. Those young men were so lovely and kind to a little girl and her granny and I learnt not to judge a book by its cover.
GD was so delighted that when asked by her mummy and daddy what she'd done that day said, "Granny took me to McDonald's to see some men with tattoos"!