The meaning of this dream is, in general, the arrival of unexpected profits. To bake a cake shows the willingness of the dreamer to improve the quality of her friendships; and to eat it, the reunion with a loved one not seen in a while. Sweet cakes predict success in business; and those made with raisins, good times in social relations.
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.
Reading in dream
Sometimes you will not be able to differentiate lucid dream. If you want to be sure, try reading a simple sentence, if you are able to read then you are in wakeful stage if not you are in lucid dreaming. Studies show that you cannot read while dreaming or you will not find the repeated sentences one more time.