Cerumen, commonly known as the earwax is produced in the outer ear canal, which is the area between the fleshy part of the ear on the outside of the head and the middle ear. In rare cases, the ears of the kids' make too much earwax. It can build up and later block the ear canal if pushed in by a finger, cotton swab, or other objects. This condition is said to be called "impaction." A pediatrician can help your child in such a situation.