It's very common for children to have nightmares, and believe there is a monster in their room. Even as adults, we can feel fear and be a little disoriented when we wake from a bad dream, but we are able to distinguish between the real and the imaginary. Young children aren't yet able to logically reason; they actually believe that a huge monster will fit under the bed or in the top drawer of the dresser. These fears are very real to your children so telling them, "there are no monsters under your bed," won't alleviate their fear, and in some cases will make it worse. Using your child's dominant sense to change their focus and melt away their fears can be a wonderful tool to help your child, as well as teaching them how to refocus when things get scary - so the aim is to distract, resolve, then get them back to sleep.