The Aussie is intelligent, learns quickly, and loves to play. This means that a bored, neglected, unexercised Aussie may invent its own games, activities, and jobs, which to a busy owner might appear to be hyperactivity: for example, an Aussie may go from being at rest to running at top speed for several "laps" around the house before returning to rest. Without something to amuse them, Aussies can become destructive. Aussies also do best with plenty of human companionship: they are often called "Velcro dogs" for their strong desire to always be near their owners and for their tendency to form intense, devoted bonds with select people. With children, they work best with children over the age of eight: this is absolutely not because they do not like children or have a short temper with kids (most are quite friendly to children) but more because there are rambunctious specimens of this breed that, though they do not intend to hurt the child, get carried away and may knock the youngster over. Other untrained Aussies may nip at the feet and heels of small children, like they would with sheep, but this is out of boredom or lack of boundaries set by their owners.