Picture of Open Cube Modular Origami
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I connected 14 cubes together to create the rainbow cube chain seen above. It took 168 sheets of paper. 

You can make an open cube of your own using just 12 sheets of paper and few simple folds. These open cubes are pretty fun to make and look good in both solid color and rainbow. 

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Step 1:

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All you will need to make a open cube is 12 pieces of origami paper. 

Step 2:

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Fold the paper in half then unfold. Fold the edges into the middle to meet at the center crease. Turn the model over. 

Step 3:

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Fold the bottom right corner up to meet the top edge. Unfold that turn the model over. Grab the bottom left corner and bring it up a bit while opening it. Smash it down to create the triangle with a missing corner as show in the last picture. 

Step 4:

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Fold down the top right corner then undo that fold. Fold the right corner tab up as shown in the third picture. Now fold the entire right corner down again on the crease you made before. Tuck the tabbed corner you folded under the flap. 

Step 5:

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Fold the entire model in half the long way. Fold the triangle tabs in half as shown. The unit is now complete. 

Make 12 of these units. 

Step 6:

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Begin assembling the units but connecting three of them together. Insert one piece into the other as shown in the first picture. Once inserted, the crease on the tip of the inserted one should line up with the main crease of the one it was inserted into. 

Attach a third unit to lock these in place. Again, you'll know it's in the right way when the creases match up. 

Step 7:

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Keep attaching units, 3 to a corner, to form a cube. After you've attached all 12 you'll have a fun open cube, good job! 

CatherineL7 made it!19 days ago

Made from squares made from A5 paper. Took quite a while but it is pretty strong. Not sure I have the patience to make a chain!

NFL_Hands7 months ago

very nice. this unit is also able to be folded twice from the same square split in half

mikeasaurus3 years ago
I love the way they look in a rainbow chain.
laxap vishalapr3 years ago
sherrycayheyhey (author)  mikeasaurus3 years ago
Thanks. They could be connected into a ring too but I find the chain more appealing (it's also much more difficult to connect the last two in the ring).
BzeanBea3 years ago
Hi did you use standard 2 inch paper?
sherrycayheyhey (author)  BzeanBea3 years ago
I think of standard origami paper as the 6 inch large sheets since that's the size I see most often. For the cubes shown I used smaller 3 inch sheets but both sizes work just fine. I like to use smaller sheets when doing modular origami because sometimes the models can get pretty big and the smaller ones seem to hold together better but it's all personal preference.
Awesome!  So much fun!
How lovely! Would they be strong enough to hang? I've successfully hung many of my origami projects from clear floss, string, etc. Your cubes would look beautiful made into a mobile. Did you use a pattern or design this yourself? Thanks:) =^..^=
sherrycayheyhey (author)  happi cat #713 years ago
They are strong enough to hold the weight of the other cubes in a chain so there should be no problem stringing them. You could even try to thread the string through one of the corners where three units meet and knot the end so that you don't have to actually tie onto the model.
When I was little, I tried to make this! Had a bad time though. That is when I was like 7 or or so. I made one now (I'm thirteen) from I book I got at the library! Loved origami back then(still do!). Good Job! :D
Your origami skills must have gotten better then haha. I've loved origami since about 3rd grade and I'm 22 now. I build much more complex and larger models now but I still get as much joy transforming a square piece of paper as I did then.
monsterlego3 years ago
Very nice!
sherrycayheyhey (author)  monsterlego3 years ago
Thank you. I like your latest profile LEGO brick.
awesome!!! like how they connect