Marshallese Stick Chart Navigation Puzzle

One player arranges sticks and shells on a table to create a chart representing wave patterns and islands.

Another player studies the chart for a set time, then looks away while it's rearranged slightly.

The second player must rebuild the original chart from memory, explaining the wave logic as they place each piece.

Compare the rebuilt chart to the original and count matching placements.

Swap roles so each player gets a turn designing and a turn reconstructing.