The children, aged between one year and ten years have been admitted since 8pm yesterday.
The parents say that the children had fallen sick after a meal of rice and chicken, which was provided by a NGO after a daily class at the Templestore estate.
The children have been suffering from vomiting and diarrhea.
Watawala police are conducting further investigations.
(Pics : Ranjith Rajapaksha - Hatton correspondent)