Step 1Draw on the plastic base two identical shells connected by a band.
Cut out the outline.
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You can also fold the plastic bottom in half and then draw and cut a single shell to form two perfectly identical shells. |

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Step 2Cut a slit at the top of the shells.
Cross the tips and staple them together so the shells are hollow.
Cut off the excess. 
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Step 3Close the two halves of the shell.
Staple the band inside the shell. 
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Step 4Decorate the outside of the mussel with waterproof paint. 
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Step 5Staple small elements (paper algae) to the inside and a thread with a small floating object at the other end. 
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Step 6Close the shell and wrap it with a strip of paper.
Glue the ends of the strip of paper together.
Let the glue dry by pressing the ends with a clothes pin. 
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