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One sheet for the top and other for the bottom
First, let's cut a hexagon to make the top of the acorn
Fold in half and unfold
Fold in half and make only a small crease at the center
Fold the bottom to the center and make a small crease near the right edge
Turn the upper part of the crease into a mountain fold
Bring the top of the mountain fold to the small crease on the right
Now bring the mountain fold to the left side along the crease you just made
Fold in half
Valley-fold and mountain-fold on the existing creases
Make a little pinch mark
Cut from the pinch mark to the corner
Hexagon done!
Download and print the crease pattern to make the bottom
Diameter = width of the hexagon from side to side
Cut the circle from the other sheet of paper
Circle done! Now we're ready to fold the acorn
Fold and unfold the top and bottom to divide into 4 parts
Divide each part in half
Divide each part in half
Divide each part in half to get 32 parts
Invert the valley and mountain folds This will make it easier to fold later
Rotate and divide into 32 parts again
Rotate and divide into 32 parts again
Now we have a triangle grid Next step is making Eric Gjerde's Spread Hex Tessellation
Find the center hexagon with 2 units in length on each side
Mountain-fold the line from the left corner to the corner of the center hexagon
Mountain-fold two sides of the center hexagon too
Valley-fold the lines next to the mountain folds making pleats
Flatten the model
Mountain-fold the next edge of the center hexagon
Unfold the pleat and make a mountain fold from the corner of the center hexagon
Make the valley folds next to the mountain folds
Flatten the model
Repeat the same procedure on each side of the hexagon
On the last side you have to deal with two corners at the same time
Continue making more hexagons as indicated
Now the hexagons overlap, so only make the visible sides
You can find where to make a hexagon on the direction of each corner
Make a hexagon between each of the hexagons from the previous step
Make two hexagons on the direction of each corner
Make a hexagon between each pair of the hexagons from the previous step
Spread Hex Tessellation complete!
Rearrange the flaps of 6 hexagons surrounding the center hexagon
Push from behind to pop up the center hexagon
This is the simple version of the top You can also try the advanced version
Turn the vertical line into a valley fold and bring the sides together
Mountain-fold the horizontal line to lock
Repeat on the other corners
Top of the acorn is complete!
Use the printed pattern as a template for scoring on the paper (You could also print it directly into the paper)
Use a pen or other thin object firmly on the lines of the crease pattern
Make the curved folds The blue lines on the crease pattern will be mountain folds (with white side up)
Now the red lines
Fold everythin and shape it
Make a point Twist the bottom tip if necessary
Attach the top of the acorn
Acorn finished!