DD is generally ok but when she doesn't get her way can be a horror. She has cried, jumped up and down stamping her feet because she was not allowed something. She's now doing the same over something else she's not allowed to do.
My older two we used 123magic and it worked well. Even now I can start counting with my 12 year old and any poor behaviour from them very quickly stops because if it doesn't their Xbox goes off.
DD doesn't seem to care about anything and just has a massive tantrum lasting ages.
Any suggestions?