What to do about my 7 year old? He still acts 2!?

I am guessing he is angry at being one of many and not receiving the attention that all of the others do. He possibly knows that it is not normal for his family to have another family there. I am willing to bet that it is crowded in your home, and chaotic as well. I am also willing to bet that you are feeding him processed foods that are harmful to his health. All of these things will add to the stresses he has. Do either of you smoke? Drink? Do you go out often? Who gets the new clothes? Where does the money go?? I would suggest that you provide your son with an allowance. One dollar for each year old he is per week... 7 dollars per week. Now, write out a chart. This chart will have what he has to pay if he does not do his chores, or if he talks back. Example: Each Sunday he starts out with 7 dollars. He has chores to do each day... make his bad, do his homework, do dishes... what ever you decide together. If he chooses to NOT do the chore, then he has to "pay" you to do it.... like one dollar if you have to do the dishes. Now he has 6 dollars. Keep track, and he gets paid Saturday evening. He will get the amount left over. This will give him a desire to do the things that together you have decided on, and he will have his own money. Teach him how to properly spend that money, save for the things he wants, etc. NEVER ask him for any of his money, and NEVER not pay him. Also, NEVER use this as a way to manipulate him. I am guessing you are not too educated, and that there is not much money coming in. Your writing skills tell me this. And, if this is the case, then I am guessing that he might need some structure and guidance that you are unprepared to give him. If you want him to be a positive citizen some day, then you must be the example... and that might mean going to school, getting an education yourself, and bettering the situation for all of your family.

sounds to me like he wants attention,i know its hard when you have kids(i got 4) with no money(or very little) they always want something and you feel like you are always saying no to them but they will survive not having all that 'stuff' they ask for what they cant do without is your attention and love,do you ever just go out with him or set aside time to do something just with him-no brothers or sisters.i really think you should(and i know it wont be easy)but its not his fault you are overstretched(and iam really not bein mean when i say that hunny)but make sure he knows that you are his for a set time maybe when the others are in the bath(read or draw with him) no housework or distractions,then if you can get out with just him to the shops(tell him he is going to help you-let him have a list of stuff to get)i think he needs some one to one with you and if he aks like the younger ones,he may get what you give them..if you can only do half hours here and there,thats cool but let him know you want to spend that time with him(just him).good luck x