Basic sewing kit – thread, needle, scissors, pins
Tea light (and matches)
Paper/card, pencil/pen to make flower template, you can just use a circle or make a flower template
Fabric – synthetic silky fabric, does it melt when held near a flame?
Mary uses off cuts from superhero cape, in the fabric shop at Polsloe Bridge

Or you could try Sew Bazaar in North Street, we think they call it poly-satin. 
Additional bits: buttons, beads to use for embellishing the centre of flower and if you’re a completer finisher then a brooch back, blank hair clip or similar.