Cool Cardboard Clam Costume

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Introduction: Cool Cardboard Clam Costume

At school we were recently assigned a project where we designed and created a cardboard halloween costume. This costume had to be made out of slotted construction and also had to have a marine theme. I chose to make a clam costume. During this process we had to design the costume on paper, trace them onto cardboard pieces, and then finally assembling them. I had many different ideas while creating this idea, but i finally came up with the best solution which is diagrammed here in my instructable. 

Design Brief: I was part of a group with five members, our task was to design five costumes with a common marine theme using the method of slotted construction. My task in this group was to design and produce a clam costume out of slotted construction. 

Specifications:
- The costume must be able be able to be worn by a middle school sized child
- The costume must be a Halloween costume or a stage costume 
- The costume must be flat pack construction (flat parts that can easily be folded and assembled)

Limitations:
- The costume must strictly be made of cardboard
- No staples or adhesive may be used
- The costume must be only slotted construction
- The costume must be flat pack construction
- The cardboard for this costume must be easily obtainable

Material List 

- (S1) Cardboard Top Shell Piece, size 18" by 21", Qty 1. Can be made out of  the back of a trifold board.
- (S2) Cardboard Bottom Shell Piece, size 20" by 25", Qty  1. Can be made out of half of a speaker box.
- (T1) Cutting Mat, to make cutting easier and to protect the cutting surface.
- (T2) Utility Knife, to cut the cardboard.
- (T3) Ruler, to make straight lines.
- (T4) Pencil, to mark cuts 

NOTE: 2 ply cardboard may be better to use for this costume.

Parts List
-  ( P1) Top Shell 
-  (P2) Bottom Shell




Step 1:

1. Start with a sheet of 2-ply cardboard. Mark off 18 inches for the bottom of the top shell(S1). Measure with a ruler (T3) and score with a pencil(T4) for the correct length.
2. Measure with the ruler(T3) 21 inches from the center of the bottom of the shell and mark it with a pencil(T4)
3. Draw rounded edges with a pencil (T4)
4. Use a utility knife(T2) to cut out the shape where the designated lines were drawn
 

Step 2: Construction of the Bottom Shell

1. Start with a sheet of 2-ply cardboard. Mark off 20 inches for the bottom of the bottom shell(S2). Measure with a ruler (T3) and score with a pencil(T4) for the correct length.
2. Measure with the ruler(T3) 25 inches from the center of the bottom of the shell and mark it with a pencil(T4)
3. Draw rounded edges with a pencil (T4)
4. Use a utility knife(T2) to cut out the shape where the designated lines were drawn
5. Measure 5 inches from the bottom of the shell with the ruler(T3) then mark it with a pencil(T4)
6. From the mark you make in step 5 measure 10 inches from that point with a ruler (T3)
7. Draw rounded edges with a pencil(T4)
8. Use a utility knife(T2) to cut out the shape where the designated lines were drawn
9. Measure 2 and ½ inches from the bottom of the shell and mark with a pencil(T4)
10. From this point measure horizontally with a ruler(T3) 18 and ½ inches
11. Use a utility knife(T2) to cut out the shape where the designated lines were drawn
 

Step 3: Assembly

1. Take the top shell(p1) and insert it into the slot that was made in the bottom shell(p2)

For more information see the following attached file.
 

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