A first-of-its-kind exhibition on childhood cancer awareness began in the premises of the Taj Mahal here on Sunday authorities said.As many as 1500 children are expected to participate in the three-day exhibition which is a part of the 'Go Gold India-Taj Goes Gold and UP Goes Gold' campaign of non-government organisation (NGO) 'CanKids..Kidscan' National Society for Change for Childhood Cancer in India.Uttar Pradesh (UP) Chief Minister Akhilesh Yadav has also extended his support to the campaign.Speaking at the ceremony Agra District Magistrate Gourav Dayal said 'CanKids' initiative is really appreciated and we thank the organisation for this novel cause. The