He won't turn sweet on his own at 2. It's not about the other kids, it's about his normal age. Is he adopted? Me to! I thank my parents often for enforcing good behavior in my brother and I and not letting us terrorize everyone like lots of 'age appropriate' toddlers today. He'll either get worse if you let him, or you can nip this and have a sweet toddler. For this age, the less drama the better. He's too young for empathy and long verbal explanations, and ignoring will let it get worse. Be firm, calm, concise and consistent now, and enjoy a well behaved child much sooner. You can then use logic and kindness as your main tool when he's old enough 3-ish if you set his firm foundation quickly now. But if you wait until he's older to start-watch out , you'll have much bugger battles. Great toddler book which is not an anti discipline book: Back to Basics Discipline by Janet Campbell Matson. I used tons of tips in it, and I have 3 happy great kids under 5 I can take anywhere who need almost no discipline. You want to be a kind, loving parent all the time, and you should be, so keep the discipline brief, non angry, and firm in order to achieve that status quo. My spirited son had most of his discipline between the ages of 1 and 2. He's now an awesome 3. 2 is getting up there on the easy learning window before battles get bigger-don't delay!