barley, fennel, peppermint
A tea brewed from these ingredients will calm hyperactive children if given in 1-cup amounts, when cool:
Cook some barley in plenty of water. Strain and save the water. Bring 1 pint of the barley water to a boil and add fennel seed and parsley, 1.5 tsp each, then let simmer for 5 minutes on reduced heat. Then steep for exactly 20 minutes. Let cool and keep refridgerated.