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Siren Whistles

$1.00

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These fun plastic whistles come in 4 great fluro colours- blue, yellow, green and pink. The harder you blow the louder and longer the siren. It operates by having a spinning wheel inside the whistle spin as the air passes through. Can you imitate this sound with your voice? Can your voice go up as high as the sound you make on the whistle? Lots of fun to be had.