Percussion Plus red plastic wind whistler A413641 No need to mess with

No need to mess with delicate sizing mechanisms

9% of bacteria

the units benefit from a breakfast bar at one end

each set includes six rollers measuring 72 x 34mm

Covered steel body with anti-corrosion finish

Percussion Plus red plastic wind whistler A413641 No need to mess withThese whistling tubes or 'noise makers' will keep children entertained for hours, whilst also demonstrating the fascinating physics behind music. To play, simply twirl the red tube around in the air. The air moving through the instrument produces a range of tones, loosely on the harmonic scale. When twirling the Wind Whistler, the air molecules within the tube begin to bump together and these vibrations produce sound waves. When you twirl faster, a