Take a square piece of paper
Fold it in half diagonally
Unfold it
Fold it in half diagonally the other way
Unfold it
Fold the paper in half horizontally
Unfold it
Push the sides inward to form a triangle base
Fold the top corners of the triangle to the center line
Fold the outer edges toward the center
Fold the bottom points upward
Fold the lower section upward to make the frog body
Fold the back legs outward
Fold the front section to shape the head
Fold the bottom part upward to create the jumping spring
Press all folds firmly
Turn the frog over
Press down on the back to make it jump