This is a quick, easy learning activity to prepare and water is involved so it keeps the little ones entertained!!
I showed Carter what a ‘full cup’, a ‘half full’ cup and an ’empty cup’ of water looked like.
He then had a go at filling each one according to my instruction e.g ‘fill that one halfway’ and we then compared it to the other two cups. Although informal, it has started the process of comparing different capacities and it has introduced him to new mathematical language.
For older children you could fill different shaped containers, asking them to estimate which would hold the most/least water before filling them and then comparing their results with their estimations.