This dream indicates the existence of a problem, a change of situation, or dilemma. If you are able to open the lock and move on, the response will be positive, but if not it will be negative. If you force the lock it means that you will try to achieve your goals using any strategy, whether lawful or not. (See door and threshold )
In most kids, lack of sleep can surely result to ADHD (Attention Deficit Hyperactivity Disorder), which is the opposite with the adults. Children between 7 and 10 who gets less than 8-hours of sleep every night will likely to become inattentive, impulsive and hyperactive. Their sleeping patterns can easily affect their brain.
Do blind people dream?
Dreams in blind people depend on the nature of their blindness. Individuals who have born blind will not have visual dreams instead they have night mares, most of them revolving around their challenges faced during the day. They experience dream through their sensory inputs like touch, smell, noise and emotions. People who were blinded after birth can experience visual dreams based on the visions or images that they have seen.