When you were kids, I think just about everyone did this during the craft time.
It's just that it's hard to do for kids and even if successful, flute's sound didn't sound right. It was just a glorified whistle.
This is why I came up with this product.
It's a small clipper tool that can turn straws easily into flutes with correct pitch.
Please go to the site and vote for me so I have a chance to make it into a real product.