Drinking Bird

1. Drinking Bird Materials: Drinking bird toy; cup of water What you do: Wet bird's felt head and let it cycle. What students see: Bird repeatedly tips into the water. Question: What keeps giving the bird energy to move? 2. Instant Cold Pack Materials: Commercial instant cold pack What you do: Activate pack and feel outside temperature change. What students see: Pack gets cold without ice. Question: Where did the heat go? 3. Hot Ice Tower Materials: Prepared supersaturated sodium acetate; seed crystal; tray What you do: Pour solution onto seed crystal. What students see: Liquid freezes/crystallizes into a warm tower instantly. Question: Why does touching one crystal change the whole liquid?

Predict → observe three demonstrations → compare what changed → choose independent activity station → cleanup/share. Guiding questions: Question: What keeps giving the bird energy to move? Question: Where did the heat go? Question: Why does touching one crystal change the whole liquid?