You will need:
Walnut shells (halved and cleaned out)
A candle and matches/lighter
glue (i used craft glue)
Fabric to make the sails
A cocktail stick.
3. Pour some wax from the candle into the walnut shell. I fill it up half way so, once set, it is enough to hold the stick in place.
4. Place the sail stick into the wax and hold in position for around 30 seconds to let the wax set around.
There you have it! If you wanted to do this with children, you could always use bluetac or just a little liquid glue at the bottom to hold the stick. Let me know if you make these :)