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Compare the behavior of different liquids like water, oil, and mercury to see which floats. Flame Colors: sandboxels school

• Objective: Model how pollutants spread in groundwater.
• Procedure: Create a layer of gravel, then sand, then soil. Pump water through the bottom. Spill a single pixel of crude oil at the top. Students use the "absorption" tool (activated charcoal) and clay to try to contain the spill. They learn that contamination is easier to prevent than to clean.

• Strict sandboxing: no network access from student code except whitelisted educational APIs.
• Resource caps (CPU, memory, runtime).
• Content filtering for uploaded assets.
• Student actions logged for teacher review.