A detailed demonstration of how to make the bee hummer, including a discussion of materials needed, troubleshooting tips if your hummer isn't humming well, and a demonstration of how the instrument should be played.
The science behind the rocket and rocket launcher in the Bottle Blast Off activity, with troubleshooting tips for how to fine-tune the nose and fins of the rocket for better flight. Also includes tips on how to take the activity further by making a simple inclinometer to measure how far your rocket flies.
A detailed demonstration of how to make this small friction drum, including a discussion of materials needed and how different kinds of materials make for cuicas that produce different sounds.
