• Preference for "sameness," and resistance to change may result in tantrums or meltdowns, even with minor changes in routines or what would appear to be special treats to others (e.g., circus; going out for ice cream).
• Although some create rich, imaginative fantasies, their creative play is typically limited to repetitive routines done over and over (such as a fascination for lining up or spinning objects).
• They may have unusual motor behaviors such as hand-flapping, spinning, or toe-walking.
• In others, the repetitive routines may be verbal, such as talking incessantly about their own special interests.
• They may have decreased fear of dangers or a tendency to wander away, requiring careful supervision.
• Attention spans often vary in the same individual.  They may be attentive to their own special interests for long periods of time, but have little tolerance for new or difficult subjects.  Activity levels can range from hyperactive to lethargic and difficult to motivate.
• Difficulty with sensory processing may result in unusual behaviors.  Individuals may be oversensitive or undersensitive to certain sights, sounds, tastes, smells, or touch, causing them to react with tantrums or panic. Altered touch sensations may lead them to avoid being hugged or to seek out deep pressure.
• They may be able to respond to stimuli through only one sense at a time (such as hearing or vision).
• Gross and fine motor skills may vary between age-appropriate and awkward, with notable difficulty in handwriting. Toilet training is often considerably delayed.  Some individuals with autism have unusually good balance, often accompanied by interest in climbing to high places.
• Frequently, parents report that their ASD children have unusually good memories for routes and locations.

What we presently understand about autism is that early, correct diagnosis leading to appropriate early intensive education and treatment offers the best opportunity for individuals with Autism Spectrum Disorders to reach their potential.