Read the forums, guys....There is already thread about the new cheat for the most recent update (July 2013).
Go to your Children's store and select PRETEEN. About 3/4 of the way through the items, there are two items that can be purchased for free. There is a punching device and a record player. If you return to one of your houses, you can sell them and make 900 on the first item and 500 on the second.
Hope that helps..