Children tend to have a lot of energy. Almost all of them have
rambunctious days, and most can long outlast moms and dads on a
playground. So if you have a little trouble getting a kid to
settle down and focus, it may not be cause for concern. In some
cases, however, a child's negative behavior patterns and high
energy level might indicate that he or she has ADHD. When a
child has ADHD, or attention deficit hyperactivity disorder, his
brain has a malfunction that results in a lowered ability to
control impulses, behavior and/or attention span [source:
O'Regan]. This may result in that child being hard to control,
temperamental or needy for attention. Parenting is always a
challenge, but if your child has a disorder, it can be that much
harder. For example, children with ADHD may struggle in school
or have self-esteem issues, thus requiring added attention and
diligence from parents [source: Mayo Clinic]. If you're the
parent of a child who has ADHD, you're probably well aware of
these challenges and face them