A condition of probation prohibiting a juvenile from possessing any dangerous or deadly weapon is sufficiently precise to satisfy constitutional requirements. Petitions alleging assault with a deadly weapon and robbery were separately sustained and minor was declared a ward and placed on probation with a condition prohibiting him from possessing any “dangerous or deadly weapon.” The appellate court rejected appellant’s claim that the condition was void for vagueness, such that appellant would have to “guess at its meaning.” “Dangerous or deadly weapon” has a plain commonsense meaning that puts R.P. on notice of the prohibited conduct of possessing any item specifically designed as a weapon, as well as any item not specifically designed as a weapon but which R.P. might possess with the intent to inflict death or great bodily injury.