begin by defining capacity.
Have students estimate how many cups make a pint, how many pints make a quart and finally how many quarts make a gallon. Confirm their answers by allowing students to go up and demonstrate using the measuring cups and colored water.
Have them chant: 2cups in a pint, 2 cups in a pint, Know I know there are two cups in a pint.
Then they will create a gallon guy.
A whole construction paper (RED) will be label with a marker as a gallon. Then cut another construction paper(BLUE) into four equal parts and paste those 4 parts as arms and legs on the first construction paper(RED). Label the 4 blue parts as quarts. Get a new construction paper (WHITE) cut into 8 equal parts and paste two white pieces on each blue paper.
Label the white pieces as pints. Finally, out of another construction paper (GREEN) cut out 16 equl parts in the form of a cup. Paste two green cups on every white pint you have on your gallon guy.
You have completed the entire body of the gallon guy.
As an art activity you can have the kids draw and color a face out of construction paper as well, then past it to their gallon guy.
HOpe it helps