A reward chart can be effective, first relating to

A reward chart can be effective, first relating to small periods (no picking from 4pm to 6pm) and only expanding to longer stretches once they're managing this. Involve them in choosing rewards and pile on praise when they aren't indulging. Finally, be patient. Psychologists warn that children's habits are tricky to break. Five common children's habits

1 Nail biting

Famous biters include Gordon Brown (now reformed) and Britney Spears. Caused by nerves or boredom, nail biting looks awful and leaves digits battered. At worst, it causes bleeding and infection. If nibbling intensifies, assess whether there's anything particularly stressful going on and deal with that if possible. Divert fidgety fingers with a stress ball or play-dough. Bitter-tasting nail paints can be effective but are best used only if your child wants to quit. Support efforts with a reward – girls might like a mini?manicure at the end of a nibble-free day/week.

2 Thumb sucking

Causes dental damage and leaves older indulgers