My DstepD had to have her hearing checked as the day care people thought she was hearing impaired. It was just selective hearing. I also remember her having some awful tantrums at around 3. Her big things were wanting to open the public toilet doors, flushing the toilet & putting the taps on. If I forgot & did it for her she would go absolutely mental. She's now grown out of it. She was also a shocker with washing her hair but is much better now. We are still working on the hair brushing - let's just say that's still a nightmare. She's completely normal.