This is a super simple tutorial for self-rebounding spring origami. The steps and materials required are also very simple. Fold a square piece of colored paper at two points in the middle and 1/4 as shown in the picture.
Fold in half at the 1/4 point as shown above.
Fold in half as shown.
Fold both sides toward the middle.
Fold in half along the middle crease.
Fold the left side upward as shown.
Fold along the creases as shown in the picture.
Assemble as shown.
Fold some more and assemble them, and the spring is ready.