4 games from the Clean Water Lab simulation: Order It, Sort It, Match It, Predict It. Each one has a Warm up, Explorer and Expert level.
Build the filter: put the layers in order from top to bottom. Drag the cards into the boxes in the right order, then press Check. You have 2 tries for each one.
Saves water or wastes water? Drag each card into the right group – or tap a group. You have 2 tries for each one.
Match each method to what it does. Drag each card to its partner – or tap a card, then tap its partner. You have 2 tries for each one.
Think about clean water. Read the question, think, then tap your answer. You have 2 tries for each one.