Butterfly bomb or ball


The Butterfly ball or bomb is an unusual, decorative modular fold that at the same time is an action model: Smack it into the air and it literally explodes into a cloud of butterflies.

The module is just a waterbomb base, simple as that. The assembly requires some patience, but adhere to the description below and most likely you'll succeed.

Thin paper is most butterfly-like, but stiffer paper (copy paper and upwards) is easier to assemble. Paper 7.5 cm square is suitable, giving a model width (and height) of also 7.5 cm. Smaller paper sizes are more difficult to assemble.

The description uses 4 different paper colours for clarity. This is also very decorative, but otherwise use any colors you fancy.

See also weekly fold 2008-42.

Thanks to Kenneth Kawamura for permission to present this diagram.

Core module (waterbomb base)

modul foldes, 01
Front up.
modul foldes, 02
Book fold...
modul foldes, 03
...and open again.

modul foldes, 04
Turn over.
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Diagonal fold...
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...and open again.

modul foldes, 07
Diagonal fold the other diagonal, too.
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Fold together. This is the waterbomb base.
modul foldes, 09
For our use it needs to be a bit more open.
Make 12 modules in total.

Assembly: bottom

bombe samles, 01
Place a module on the table.
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Put the next module orthogonally into the first one.
bombe samles, 02
Top view.

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The third module.
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Top view.
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The fourth and last bottom module must be weaved in.
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And top view.

Assembly: sides

bombe samles, 08
Put a module down vertically, one "leg" inside and one on the outside.
bombe samles, 09
Top view. The model is pretty loose...
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...so push it well together. It is important that you do this frequently from now on.
bombe samles, 11
Top view. Note that the cross in the bottom middle is closed again - you should keep it so, otherwise the model may fall apart.

bombe samles, 12
Put in the next module.
bombe samles, 13
Top view, after you have pushed the model together again.
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And the third side module.
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Top view, again pushed together.

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The fourth and final side module.
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Top view. Pushed well together, ready for the top modules.

Assembly: the top

bombe samles, 18
Weave the first module inside and outside the two side module points, respectively.
bombe samles, 19
Top view.

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The second module, weaved like the first one has started. But it must be weaved outside the previous top module as well, you'll need to pull the the point back to do that.
bombe samles, 21
In place.
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Top view, and well pushed together.

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Third top module: Weaved outside the previous top module, and inside and outside the side points, respectively.
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Top view.

Assembly: the final top module

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Ready for the final top module.
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Put it on like the previous ones.

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Top view. It must go inside the first top module, not outside.
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Wriggle the model a bit apart and tuck the point into the first top module.
bombe samles, 29
Push well together.

bombe samles, 30
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From another viewing angle.