Sand-glass
by Katrin & Yurii Shumakov
Glass
Glass
For glass, use a square of paper, 20x20 cm in size.
1 Valley fold and unfold the square of the paper in half.
2 Valley fold and unfold the top and bottom edges to meet the middle fold-line.
3 Divide the paper into 8 equal sections by valley folding. Press the folds flat and unfold them.
4 Turn the paper around. Make small marks, by dividing the edges in half.
5 Valley fold and unfold the top and bottom edges to meet the middle marks.
6 Valley fold and unfold the top and bottom edges to meet the fold-lines made in step 5.
7 Make the 'valley' folds.
8 Turn the model over. Make diagonal creases as it is possible exactly.
9 Valley fold the top and bottom edges.
10 Bring the left- and right-hand sides around and together as shown. Twirl a sheet in a spiral on the planned creases, pull against each other extreme segments. Compress layers by fingers, which find against each other, at the centre of a spiral and fill edges of last segment under the bent edges another.
11 Mountain fold the top and bottom edges.
12 And once again.
13 Glass for a sand-glass is ready!
