I have an 18 month old boy. About 3 weeks ago he started to slap my DH and me in the face. We couldn't put it down to anything (hunger,lack of sleep,attention seeking) in particular. About 2 weeks ago the nursery where my son goes 3 days a week said that he had started to slap the younger children (one nursery nurse even called him spiteful which upset me a great deal as I have never heard or been told anything critical of him before and I think spiteful sounds awful). He has now started to slap other children when he is with me. Today we were at a friend's house when he started slapping the little girl (same age) on the face. Initially I held his hand and made him stroke her cheek softly whilst smiling at him. When he slapped her again I shouted at him. When he did it again I put him in another room. I could tell my friend was upset at my discipline choices - and to be frank I am upset too because I don't know how to make him understand that slapping is not nice. Please help.