My daugther is 18 month old, she is a happy girl, always smiling and very sociable, but today just before bed time she started crying uncontrolable, throwing everything from her crib to the floor, didn't allow me or her father be next to her or talk to her, and all of this "tantrum" last about 15 to 20 minutos,i would like to know if this is a normal behavior at this age and how to handled, please, we were desperated.Thank's, tere.