I am new here, luckily I found this site yesterday while using Google to find ways to calm my son down. I have three kids, a 14 year old daughter, a 4 year old son, and a 3 year old son. My 3 year old was diagnosed with Autism on 2/21/2011. He is in preschool at the local elementary school in the Special Education program, which has done wonders for him. I have no doubt that he is going to be okay, assuming that he will continue to receive the support he is getting now. My 14 year old is a typical teenager...She hates EVERYTHING. It's too hot, too cold, too sunny, too cloudy, etc. My "problem" is my 4 year old. He is fine if he is alone with me. If I ask him to do something, 75% of the time he does it, no questions asked. I spend time alone with him 4 days a week, for 4 hours. As soon as my 3 year old comes home all hell breaks loose. He will do the oppisite of what I say. He throws things. Yesterday he was eating edemame. When he finished he threw the pods on the floor. I told him to pick them up, which caused him to run away, me to chase him, and him being put in time out until he picked them up. Things like this are normal here. We were outside yesterday and he was riding his Big Wheel. A neighbor was leaving their driveway, so I told him to get out of the street (we live at the end of a cul-de-sac). He just started pedaling faster, weaving around, looking behind him to see if the car was near him. I always tell him to look ahead, never look behind you when you are riding..The car ends up waiting for me to get him to the sidewalk so that they can back up. I told my son that because he didn't listen we had to go inside. THIS caused a huge temper tantrum. He screamed for 17 minutes. I would leave the room and he would follow me to whatever room I went to. I read online that ignoring the bad behavior was the best way to eventually end it, but it was so hard to do! 17 minutes of glass shattering screams can really pluck at the nerves! It is becoming more hostile at home...He is making everyone miserable, and my 14 year old hates having friends over now because of his behavior. He never, ever does anything the first time you ask, he is argumentative, and he loves to annoy you. I think that he has ODD, which would not surprise me at all. My husband has ADD, and with my other son having Autism it kind of makes sense to me that my 4 year old would have something along those lines. I am into homeopathic remedies whenever possible. I have tried BrightSpark and Omega-3. I read online about Bach Flowers, hoping to try that next. I will do anything to calm him down. I want to enjoy him, I want everyone to enjoy him, but right now we don't. I would love to hear advice, especially from anyone that has been in a similar situation.