Karachi, Dec. 18 (PTI): Yes, I am a kid, Benazir Bhutto's son Bilawal Bhutto Zardari said today in reply to political rivals dismissing him as a "non-serious child".

" Haan main bacha hoon. Main Shaheed Mohtarma Benazir Bhutto ka bacha hoon. Daro... (Yes, I am a child. The child of martyred Benazir Bhutto. Be scared)," Pakistan Peoples Party chairman Bilawal, 28, tweeted

The University of Oxford educated young leader attacked Prime Minister Nawaz Sharif-led PML-N in a series of tweets on his parents' 29th marriage anniversary.

His retort came after interior minister Chaudhry Nisar called Bilawal a "non-serious child" who only knew how to ridicule others.

The young PPP chairman has often been the victim of jibes and political opponents regularly shun Bilawal aside for being "a child", Express Tribune reported.

However, Bilawal is becoming increasingly vocal and articulate.