is it normal for a 9 month old to start to test you? i say "no" to my DD and "ah ah ah" when i don't want her to touch something. she will watch me to see my reaction and then when i say "no" she will crack up and scream/cry. she is funny when i take something off her, she whinges and can scream ultra loud and flap her hands about! i try not to laugh but just want to know, is it all normal??