Remember that curious little toy that created even more curious sound effects? Well, here at ndn we've brought it back! Slide Whistle works just like those old slide whistle toys, only now with a digital flair.

To play, simply tap the volume button and then slide that whistle to your hearts content.

A little practice and you'll find yourself right back in your parents living room cross-legged on the shag carpeting impressing your friends from school with your very own rendition of mary had a little lamb, or twinkle twinkle little star.