Cut 13 triangles from the felt sheets, each 14 cm wide at the top and 18 cm tall. Mix charcoal and slate grey pennants; a few ivory ones lighten the run nicely. Cut with long clean strokes of the scissors to avoid a jagged edge.

Draw a simple bat silhouette on card, about 8 cm wingspan, and cut it out as a template. Trace this template onto the remaining felt (use charcoal on ivory pennants and ivory on charcoal pennants) and cut out 13 bat shapes.

Apply a thin, even layer of fabric glue to the back of each bat shape and press it firmly onto the centre of its pennant, about 4 cm up from the point. Hold each one in place for 30 seconds. Let all pennants dry flat for 45 minutes; the glue should be fully clear and firm before you handle them.

Clip each pennant to the jute twine with a mini clothespin, placing the pin across the top edge of the pennant about 1 cm from the top. Space them roughly 12 cm apart.

Hang the twine between two hooks. The weight of the felt gives the garland a pleasing natural droop.