For the mobile, wind the wider ribbon round and round the hoop, overlapping and securing with a firm knot on the inside of the ring. Wrap the cardboard ring with ribbon too, and tie in the same way.
Cut the remaining wide ribbon into 4 equal lengths. Thread the end of 1 piece through a button and tie it around the hoop with a knot. Repeat with the other 3 lengths of ribbon and 3 more buttons, spacing them out evenly around the hoop. Take the other ends of these 4 ribbons and thread them through the cardboard ring, then through the final button. Knot off neatly.
Take 60mm of the narrow ribbon and loop it, too, through the top button. This will hang the mobile.
Thread more of the narrow ribbon through each gingerbread bird. Hang 2 from the cardboard ring and 5 from the embroidery hoop.
see: Gingerbread Biscuits