These whistling tubes or ‘noise-makers’ will keep children entertained for hours, whilst also demonstrating the fascinating physics behind music.
Simply twirl the red tube around and the air moving through it produces a range of tones, loosely on the harmonic scale. When you twirl faster a higher tone is produced.
When twirling the Wind Whistler the air molecules within the tube begin to bump together, they vibrate and produce sound waves.
This very simple item, believe it or not, beautifully demonstrates ‘Bernoulli’s Principle’ – that fast moving air molecules create lower pressure.
The idea is that the far end of the hose is moving much faster than the end being held so the higher pressure at the held end effectively sucks up air which in turn creates the whistle.
- Great as a group or classroom activity
- Made from 106cm length of strong red plastic tubing
Delivery & returns
UK delivery starts at £1.95 and goes to a maximum of £5.95 (excluding Highlands & Islands which can be more for a parcel)
Free Delivery over £95 - This applies to orders delivered to the UK mainland only and (excludes Highlands & Islands)
We aim to ship upon of receipt of an order, subject to stock availability.
Once the item has been despatched it becomes your responsibility to return an order or item in an unmarked and resaleable condition before we can issue a refund to you. Please note that return postage charges cannot be refunded unless the product is faulty or not as described. Also please note that this only applies to individual customers.