Some of her behaviours include...
Stripping off as soon as she gets home
Being more interested in boxes of polystyrene than her toys
Having a tantrum every time she is told she cannot have something
Repeatedly asking for something she know she cannot have, and not giving up even when told no 4 times until shouted at and then goes and cries.
Hits out at people rather than using her words
Takes 30 minutes to eat a small bowl of cereal (won't have milk and eats cheerios one at a time)
Calls parents "mama and dada"
Likes to be held like a baby
Breaks most toys she owns
Thinking about the behaviour perhaps of your own child, I am wondering what age these behaviours are typical of - I know it is difficult as children develop at different rates but I am concerned about my child.