The best part about Roman Numerals? Its like a code. Codes are
cool. You know what else is cool? Invisible ink. Even
better…chemical reactions. It all began with a math puzzle.
During snack, each Magical Mind was give a number, written out.
For example, nine hundred and nine. Their task was to figure out
how to write the number with digits. For example, 909. There
were four numbers, and after snack I asked the kids with the
same numbers to form teams. They worked together to write their
numbers, and then I gave them a challenge. ”Work with your team
to write the Roman Numeral for your number.” Now for the
invisible ink. I wet a paintbrush in some brown liquid and
painted a white piece of paper. The liquid turned the paper a
shade of bluish-purple, except where I had secretly written a
Roman Numeral. Each team received a small vial of “mystery
liquid” to write/paint their Roman Numerals. They worked with
each other to share materials and write their numbers. After
setting our hidden messages aside to dry, we t