You will need;
Approx. 10cm x 20cm foil, plus a little bit extra,
Approx. 30cms of sticky tape,
About 5 mins of spare time.
Step 1: Mould your paperclip
Straighten out your paper clip.
Bend the last 1 to 2 cms of your paper clip into a small circe. Wrap it around pliers, or bend it against a table.
Cover this in your extra foil.
Flatten it as much as possible.
Step 2: Fit your pencil
Bend the clip so that it follows along the side of the pencil.
Wrap the clip around the pencil, and tape in place.