A prediction says what you think will happen before a test. A result says what happened. A mismatch is useful information, not a bad answer. Floating here means staying at the surface without hand, side or bottom support. Clear sinking means resting fully underwater on the bottom. A bottom-supported object that also reaches the surface gives an unclear result in this shallow tray. Safety: Continuous adult supervision near water. Empty the tray at once after use. No tasting; keep sponge pieces and small objects out of the activity. Stop: End after five objects. Stop immediately for spills outside the tray or any unsafe object; do not add deeper water.

Materials: Paper and pencil; Shallow plastic tray with water only 2 cm deep; towel; Five adult-approved, washable objects larger than a child’s mouth: wooden spoon, metal spoon, plastic cup, sponge, sealed empty plastic bottle 1. An adult sets the tray on a stable surface away from electrical items. Check that each object fits without touching the tray sides. Make five chart rows: Object | My prediction | What happened | Match, mismatch or cannot tell. 2. Name each object. Predict float or sink for all five before putting any in water. The adult can write your exact words. 3. Place each object gently on the water and release it. Record clear unsupported floating, clear fully underwater sinking, or cannot tell. A thick sponge or partly flooded cup can touch the bottom while also reaching above the water. Mark such a bottom-supported result cannot tell. Record any change over the observation. 4. Compare each clear result with its own prediction. Do not score cannot tell as a match or mismatch. Keep the original predictions. Choose one surprise, or say none surprised you. If no result is clear, record no clear comparison. 5. Explain one clear comparison if available: I predicted __; I observed __; they matched/did not match. Otherwise explain why the tray could not test a prediction clearly. Remove the objects and dry the work area. Done: Keep each attempted object's original prediction and actual result. Explain one clear comparison, or record no clear comparison and explain the setup limit. Mark reduced or unclear work honestly. Proof: Keep the chart and the learner’s comparison. Note adult writing, object placement or prompts. Stop: End after five objects. Stop immediately for spills outside the tray or any unsafe object; do not add deeper water.