You will need a sheet of thin paper, plain paper or origami paper.

Implementation :

The mountain folds are represented by full lines and the valley folds by doted lines.

Print the diagram with the folding lines only on origami paper or plain paper.
Print the diagram ornated with flowers on white or colored paper .
Print the diagram onrnated with hearts on white or colored paper .

Cut the square and fold it along line 1.

Fold along lines 2 and then lines 3.

Fold along lines 4 and turn paper over.

Fold along lines 5.

Fold along lines 6 and take the ears out..

Fold along lines 7.

And then fold along lines 8.

Then fold along lines 9 to have a thin tail.