The zip fastener is a clever invention that has been around for a long time - used in many products that need a quick and easy fastening method. Clothes, bags and sports equipment often incorporate a zip fastener ..... the problem is, most of them look exactly the same and can be hard to use for small hands.

Here's a little introductory project for school - pupils build clay models to start - introduce a bit of simple ergonomics....could also be used to introduce silicone soft tooling and batch production