Bells People... Use them!

A great many, even a small majority, of the children's bikes I see have broken bells - the bikes get knocked around and dropped and the bit you flick always snaps off, so reinventing the bell might not be as silly as it sounds.

Kids will break any accessory, and I don't see this design ticking the bell-for-life box. There are plenty of decent models out there already, either robust, or ultra-cheap-but-effective and replaceable.