Paper bridge

This device cannot show the 3D view. Follow the step pictures and text below instead.

1. 

   1. Crease in half

   Lay the A4 sheet sideways, coloured side up. Fold the bottom long edge up to the top long edge and unfold.

2. 

   2. Crease into quarters

   Fold the bottom edge up to the middle crease and unfold. Fold the top edge down to the middle crease and unfold. There are now 3 creases.

3. 

   3. Crease into eighths

   Fold the bottom edge up to the first crease and unfold, then up to the third crease and unfold. Do the same from the top edge. Now there are 7 creases and 8 strips.

4. 

   4. Crease into sixteenths

   Fold the bottom edge up to the 1st, 3rd, 5th and 7th creases in turn, unfolding each time. Do the same from the top edge. You get 15 evenly spaced creases (about 1.3 cm apart on A4).

5. 

   5. Pleat it like a fan

   Starting from the bottom, fold the creases valley, mountain, valley, mountain… in turn, so the sheet pleats up like a fan. Press every pleat firmly.

6. 

   6. Open the pleats a little

   Spread the fan a little until every pleat is at about a right angle. Seen from the end it is a zigzag. That is your paper bridge!