Children are easily distracted by actions noise, music and other people around them. If their school is in a location where there is a lot of traffic that makes a lot of noise, it can be distracting. If the child has issues going on at home or has other problems on his mind, he may feel that school is a place where he can get lost in his own world, even though school is not the best place for daydreaming to occur.
Unfortunately, children often do not make the best choices in food and choose junk food over healthier food. Eating junk food can possibly cause an upset stomach, making the student focus on the effects of the junk food and not on her teacher. If a child has an irregular eating pattern, such as skipping breakfast or not eating enough, she may be focusing on her hunger instead of on her assignment. Certain medications can cause restlessness and daydreaming in children. You should talk to your child's doctor about any medications if your child is a daydreamer to see if it is a side effect from her medication.
Children who have autism or attention-deficit disorder may daydream. These disorders can cause a child to lose interest in the lesson plan and other things. They also may feel that a lesson or in-class assignment is not relevant and cannot concentrate on the task that is to be done.
Often a child is just bored in class and has a lack of interest in the topic. If a child is having trouble in class, he may feel that there is no point in paying attention to the lesson plan. On the opposite side of the spectrum, if a child is advanced in education, he may be bored because he does not feel challenged enough.