I'm looking for a book for my ds8 about friendship and playing with others. I notice that he plays very well one-on-one with the other two boys on our street, but when all 3 of them get together, he's always the one left out. The other 2 are older (one by a year, one by 3) and bigger. He gets upset because the others tease him, but he won't just walk away and do something else when they treat him badly. I've tried talking to him about it, but I'm not getting through. Can anybody reccommend a book for him?