Get out all those old Tupperware/plastic containers and lids, or use some disposable ones, and have fun matching the shapes! Bowls are circles and sandwich containers are squares! Big and small. Mix up the containers and lids, then have your tot match the lid with the container. Maybe even put in a snack when he/she gets it right! Or start with the lids on the containers with some small snacks inside. As you eat each one, talk about the shape of the container.
– plastic food storage containers and lids