You will need:
Cut out 8 long rectangles of orange paper or card and stick on to the green holder as hair.
Cut two circles out of a piece of black paper/card. Cut to the centre line of one and twist on itself to make a pointy cone.
Stick the cone to the other black circle to make the witches hat and stick onto the witches head.
Draw a smile and nose using a felt tip pen or sharpie.
Stick on googly eyes and stack your 3 egg holders on top of each other with a spacer in-between (you can use glue to make the models more durable - I recommend an adult use a hot glue gun if available as PVA isn't particularly sticky on these cartons).
Well done - Your craft Witch egg boxes are complete... How about trying some of the other Halloween egg box crafts following these tutorials...
If you'd like to make your house even spookier for Halloween, why not try this egg box craft bat and ghost bunting.