Once you've had a bit of practice, the cups will soon be looping in the air. This is because elastic makes the cups spin...

Enrichment Activity 5-11 11-14

If you blow softly the inner cup rises up slowly. If you blow hard the top cup launches itself across the room. Moving air has...

Enrichment Activity 5-11 11-14

The rough surface of the pipe cleaners acts as a nucleation site, encouraging the salt molecules to come out of solution and...

Enrichment Activity 5-11 11-14

Enrichment Activity 11-14 14-16