I don't know the parents of the other children at my DD's class because the childminder takes her to school. My DD had been talking about this other girl and boy with whom she plays a lot, so I got in touch with their respective mums to arrange a playdate. As we don't know each other, I extended the invitation to them as well and said that other siblings would be welcome too. Mum 1 arrived with her DS, an absolute treasure of a boy, he behaved beautifully all afternoon. Mum 2 arrived with her DD who is my DD's friend, lovely little girl, played beautifully too. Now, Mum 2 also brought DS, a 3 YO. Now I'm sorry to say he was a little terror. He screamed the whole entire afternoon, gave me a horrendous headache, interrupted our conversation constantly... but worse still, when I was having coffee with the mums downstairs and he was playing upstairs, he caused absolute mayhem. He was extremely destructive, breaking toys, tearing pages off books, banging toys against the doors and chipping the paint off and causing several dents... I was very shocked when I went upstairs after everyone had left and saw the damage. I understand that he's only 3 but surely the mum shouldn't have let him off her sight if that's how he behaves!