An origami spike ball is made of several modules or identical folded pieces of paper. These balls are a part of modular origami, in which complex objects are created from smaller, identical pieces. It's possible to create spike balls in several sizes with 12 modules up to 54 modules. The first few modules take time learning how to fold. Once the process is mastered they can be completed quickly. When you have 12 modules, it's time to form the ball.

- Skill level:
- Moderately Challenging

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### Things you need

- 12 pieces origami paper

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## Instructions

- 1
Fold a piece of square origami paper in half diagonally. Crease the folded edge Open the paper. Repeat, folding paper in half the other direction. You should end up with two diagonal lines running from opposing corners.

- 2
Fold the paper in half to form a folded rectangle. Crease. Open up. Rotate 90 degrees. Repeat. You should now have four creases intersecting at the exact centre of the paper.

- 3
Fold 1/4 of the origami paper in on itself, so that the open edge touches the middle crease. Repeat with the bottom 1/4 of the paper. Open the paper up. You should have two additional horizontal creases.

- 4
Rotate the origami square 90 degrees so that the horizontal lines are now vertical lines. Repeat Step 2. Do not open the paper.

- 5
Place thumb and index finger on each folded edge of one side of the paper. Position fingers opposing each other, close to the open end. Push in so that the open side folds in along the creases you made. This opens up the folded paper on one side.

- 6
Pull one flap open diagonally on this side. Creases on this side form four squares on the flat surface. Fold diagonally from opposing corners in the square closest to the centre of the folded paper. Repeat with the other flap. From the side the piece of paper resembles a kid's snow sled.

- 7
Push in on the front end of the "sled" folding the open end over on itself. The sides will fold out and flatten, creating diagonal edges. The piece of paper will now resemble a flattened mushroom.

- 8
Repeat Steps 5, 6 and 7 on the other open side of the folded paper. You should end up with an elongated six-sided shape.

- 9
Fold up one side to create a diagonal crease running from the outer corner of the fold to the centre of the shape. Repeat with three remaining sides. You should return to the same elongated six-sided shape.

- 10
Push in on one side with index finger to open and push it onto itself until it flattens into a small square. Repeat with three remaining sides. You should now have a square with four smaller squares on its surface, with open ends towards the centre of the larger square.

- 11
Place index fingers on the top of one smaller square. Fold this square in half backwards, opening the flap. Repeat with remaining squares. Fold the new square shape in half diagonally along both sets of corners. Crease and open.

- 12
Create 11 more squares.

## Folding the Sections of the Spike Ball

- 1
Pick up two squares. Align so one corner is on top of another. Slide one corner into the folds between the other corner and the upright "spikes" on the square.

- 2
Repeat the process with a third square, sliding it onto exposed corners of each of the two connected squares.

- 3
Continue adding squares to the first squares. Soon you'll start connecting three corners per square and finally four corners. As you do this the squares naturally form a ball.