Most parents, even those that are unaware, struggle with sensory issues if they have a child on the spectrum. A sensory craver is one that looks for sensory input, craving the sensation it gives them. As a result behaviors may ensue that are less than obvious to parents. I wanted to give a short red flag list I read for parents to refer to, in hopes this may help you identify needs your children have and get help.
Visual: likes flashing lights, spinning objects, prefers TV/video games
Auditory: uses loud voice, makes background noises, and enjoys noisy places