Bloody hell, its 2 minutes up the road from us, our kids are too small to go out on their own unless its just in front of the house but we will have to be vigilant.
Whats really scary is that I know someone who lives near this park who's son is in the same class as our son, so about 5 or 6 years old. And the little lad is always out on his own, no where near his own house. He's been down to ours before without his mother knowing where he was, and we know that once he turned up at nursery on his own, they had to call the police to take him home. I don't believe in wrapping your kids up in cotton wool, but you should still be responsible for them.
Having said that, whoever did this is some sort of lowlife. What sort of person tries to snatch a child, the girl should have kicked him in the balls....hard.