A.; yes sometimes kids can be scared and do weird stuff, but is ok most of it is part of growing up, if he is sleep walking make sure you lock the doors, and i had a neice that would do that, and i scared me she would go outside, so i would put a chair or something in front of the door, so i would hear the noise if she happened to sleep walk and want to go outside, for those kids who get scared alot you may have to teach them the power of prayer, its always a good idea to teach them to pray anyway, no matter your situaion, after all we teach them there is a santa clause, and to beleive in him, so why not teach him there is a more powerful creature than any of all this, and way more powerful than any scary dream, we had to say a prayer to our child before they went to bed and ask god for protection , and it does help, kids can be very affected by what is on the tv, or what is in movies, even kids movies can scare them, even funniest home videos can scare a child, they show monkeys taking a sandwhich or something that scares the person in the show, can scare a child, also put a small matress in your room under your bed so when he comes in there, he can sleep near you. no i never had my kids in a sleep study, so i dont knwo anything about that, but have a good day, D. s