There are many different types of measurement included in cooking, including cups, teaspoons, tablespoons, millilitres, litres, grams, kilograms.
Older children can learn about the equivalencies between measures such as 250 ml = 1 cup or 16 tablespoons = 1 cup or 1000g = 1 kg.
Discuss how important it is to be exact when measuring. Why do your measurements need to be more accurate when you are baking than when you are making a stirfry?