To set up the display you will need:
several one kilogram masses
several one gram masses
a one liter flask or beaker
twelve meter sticks and tape or a cubic meter kit from a science supply company
Make sure the display is in a location where students can pick up and feel the difference between the gram and kilogram, and see the difference in volume between the liter and cubic meter. To make the display a little more visual you can always add colored water to the flask or beaker.
As students visit the display, I ask them to record one item with which they are familiar that has the same mass or volume as each of these units. That will help them relate better to the unit, and if they forget, they can look back in their lab notebook to see what much each unit is worth.