The origami ball, or origami water balloon, is a fun toy that can be made from paper. Once it is folded, you can inflate it by blowing into it. It can be filled with water and thrown, or kept dry and used as a ball. It is simple and easy to make.
Fold the piece of paper in half diagonally. Open it and fold it again down the opposite axis. That should create an "x" shaped crease down the centre.
Turn the paper over and fold it in half vertically. Open it and fold it in half again horizontally.
Turn the paper so that the open side is down. Open the paper slightly. Pull the top corners into the paper so that they collapse into the centre. That should form a triangle. Position the triangle so that the open fold is at the bottom.
Fold the corners that form the base of the triangle upwards. Fold each corner so that it meets the top of the triangle. Repeat this on all four corners, forming a square.
Fold the corners on the sides of the square inward until they meet the centre. Do this on all four corners. The folded corners should have an open fold on the bottom. There should be a flap beneath each of these folds that folds upwards.
Fold the flap beneath the folded corner into the open fold. Do this on all four flaps.
Place your mouth at the open end of the current figure and blow. The paper should inflate, forming a balloon.
Use a large piece of paper at first. It will be easier to fold.