First, fold it in half and mark the center.

Then, fold the left and top corners toward the center.
Fold the top corner back.

Fold it in half.

Fold it again along the crease.

Unfold the crease.

Align the corners marked with red circles and fold.

Turn it over.

Then fold it so that the corners marked with red circles meet.

Next, flip it over again and form the corners as you open it up.

Now the piece is ready.

Shape it like this.

Choose your favorite color, then fold it three more times.

Now that you’ve folded it into quarters, let’s connect the pieces.

Here, look at the corner indicated by the white arrow.

Insert the flat side indicated by the red arrow into this corner.

First, insert the light blue flat piece into the pink corner.

Make sure it goes all the way in.

This is the third piece.

Place the flat pink piece into the light blue corner.

Next, here’s the fourth piece.

Insert the light blue flat piece into the pink corner.

Finally, connect the first and fourth parts.

Be careful not to knock them over as you connect them.。

First, fold it into a triangle twice.

Then, fold the left and top corners toward the center.

Fold the top corner back, then fold it in half.

Align the corners marked with red circles.

Once you’ve creased it, unfold it.

Fold along the triangular crease.

Then, unfold it.

Align the corners of the red circle,

and fold until the creases cross.

Hold the section you just folded in place, and lift the top part up.

Shape it into the right form, and the piece is complete.

Now that I’ve made one, I’ll fold three more.

Now, let’s put them together.

What we’re focusing on here are

the straight corners and the pointed corners.

The key is deciding

which corner to place on the inside.

I thought it might be easier to understand if I spread the pieces out,

so I laid them out and connected them.

I fit the pointed corners together one by one.

This creates a pattern formed by interlocking triangles.

Normally, the parts are assembled

while still folded.

Open it up, align the left edge with the center, and fold it, then fold the top back.

Now, let’s fold it in half again.

Next, fold along the dotted line, then unfold it.

Align the corners marked with red circles.

Once you’ve creased it, unfold it.
Turn it over.

Align the red circles and fold.

While keeping the dotted fold lines in mind, unfold the triangle into a right angle.

And there you have it—the part is complete.

You’ll need four of these in total, so fold three more in the same way.

Next, let’s put the pieces together.

This piece has two light blue triangles.

Actually, the small triangle is a bit shy.

That’s why it hides behind the big triangle next to it.

Take two pieces and tuck the small triangle inside the large one.

Push it all the way in.

When you turn it right side out, you’ll see two squares overlapping.

Then, connect all four pieces together.

Let’s continue and turn them into hydrangeas.

Insert the diagonal sections into the light blue background.

Do the same for the rest.

And there you have it—the hydrangea box lid is complete.