Getting knotted!

The church has agreed to have a craft stall at a local primary school's market day to raise money for all sorts of charities. Our proceeds will probably go to the meals for the homeless service that a sister church does.
I am scraping the craft bucket for speedy crafts that kids might want to buy, whilst some other folk are making significantly more ambitious items for parents to buy.
Here is tonight's effort : school bag key rings with a variety of knots, including the sailors' cross, a flag pole stopper knot, and a good old reef knot in the middle.