Ok took dd1 and friend out for day. They come running up to me with a pound they have "found" in the soft play. Because they were honest and didn't just keep it I gave them some change for the sweet machine and took the pound to the counter incase an upset child realised they had lost it.
So they are sat in the car on way home with their sweets giggling and it turns out the pound was dds from money her nan gave her and she had wanted to share it with friend but thought I would say no ( they didn't realise I had handed money in)