There is so much musical fun to be had with these colourful kids instruments and you could simply use as great party bag fillers. But why not gather some friends and hand out the Sliding Whistles, then enjoy lots of interactive play and musical mayhem as everyone blows together. To make the sound, bring the flat mouth piece up to your lips, then slide the yellow whistle handle with the rounded end up and down. Make sure you are blowing at the same time. Create sound effects to accompany stories or songs. And most of all enjoy yourselves. Maybe get some grown-ups to sing along.