Student use tool kits suppiled by Public Health Ministry's Department of Health to measure the quantity of iodine in salt during exhibitions making "National Iodine Day" on June 25 in honour of His Majesty the King of his contribution to research in iodine deficiency. More than 10,000 sets of iodine-testing kits, or I-kit, are being distributed to schools in 75 provinces. [Bangkok Post, June 26, 2004]