This fun week could be amped up to a grade level. Older students still enjoy crafts! Also a good tool when teaching the difference between salt (gulf of mexico) and fresh water (ponds, lakes, rivers etc.
Drinking Water - can usually clear up/change the color of Urine. WHAT COLOR IS YOUR PEE? Urine Color Chart: "The color of your urine says something about your HEALTH." Infographic from Cleveland Clinic HealthHub