It is common for young children to show anger and stubborn behaviour as they are still learning to express emotions and control impulses. Try to stay calm and set clear, consistent limits by gently explaining that throwing objects is not acceptable, while offering safer ways for the child to express frustration. Encourage positive behaviour by praising calm actions and redirecting attention to suitable toys or activities when they become upset. If this behaviour is frequent or worsening, consider discussing it with a paediatrician to rule out any underlying concerns and get further guidance.