Kidneys and bladder

Backblip.

I chaperoned a bus full of third-graders during a school trip to a place called "healthworks", an activity-filled building focusing on healthy habits and lifestyles.

Here you see LM acting as a bladder, while the boy next to him is a pretend kidney. The brave duo is moving urine yellow-colored water from a bucket labelled "blood" to another representing a potty. Wet fun was had by all.