We use mason jars for everything around here. Our math program encourages children to understand volume and measurement. It is only natural for us to then teach how to measure in regards to our mason jars. (When else does a child need to know about a quart?) We also decided to use colored water in order to help C. know about colors and color mixing (afterall, it is her school time too.)
First we made a jar of red water and a jar of blue water. We also had an empty quart jar so that W. would have something to fill up. Since pouring is difficult for him, a funnel came in handy as well.
Then W. poured back and fourth until he had measured 1 cup.
At this point, he poured each cup into the quart jar.
Lo and behold it made...
We talked about how the quart was empty...when it had 2 cups of water in it (one red and one blue) it was half full. We then made speculations about how many cups it would take to make it full.
We also saw how many cups in a pint and how many...
cups in a pint (2)
pints in a quart (2)
cups in a quart (4)
Overall it was a fun experiment...now if I could only get the dye out of my fingers.