Three overweight children of Gujarat also known as sumo kids are putting on weight more than ever after a failed weight loss operation. The Nandwana children underwent a weight loss operation in Ahmedabad a year ago. Now, Mr. Nandwana, 35, says he wants to sell his kidney in order to fund a better operation which he hopes will save his children.br br Subscribe to OneIndia News Channel for latest updates on movies and related videos.