New Delhi, Nov 14 (ANI): The nation on Thursday paid tribute to the first Prime Minister of India, Pandit Jawaharlal Nehru, on his 124th birth anniversary. Vice President Hamid Ansari, Prime Minister Dr. Manmohan Singh, Lok Sabha Speaker Meira Kumar, UPA Chairperson Sonia Gandhi, Congress Vice President Rahul Gandhi and other dignitaries paid floral tributes at his memorial - Shanti Van in the national capital. A series of functions are being organized across the country to mark the occasion. The day is also observed as the 'Children's Day' as Pandit Nehru had great affection for children. They fondly called him 'Chacha' Nehru.