The children had taken their meals provided by Chayanpur primary school back to their homes where they fell ill after eating it, official sources said.
All of them were rushed to Deven Mahato sadar hospital here, the sources said.
Hospital superintendent Swapan Sarkar said the children were allowed to go after first aid and all of them were recovering.
While the students have alleged that a lizard had fallen into the food cooked in the school, headmaster Ambujaksha Mahato said the children had taken the food home and the school was not aware of the reason behind their illness.