this is a insructable about how to make a origami water bomb or if you like just a box then just don't pour water in the hole.
Step 1: Materiels
One sqare piece of paper.
Step 2: FOLDING
now take the top right point and bring it down to the bottem left point now unfold now top left point and bring it down to the bottem right point now unfold now take the bottem two points and bring it to the top two points now do the same the other way.
Step 3: MORE FOLDING
Now grab the bottem left and right point and bring the top points behind to bottem ones.
Step 4: ALMOST DONE
now it should look like this. now that you have four flaps you grab the bottem 2 points and bring them to the center but only the first layer turn it over and do the same.
Step 5: FINALLY DONE
Now that it looks like a dimond take the left and right flaps but the first layer only now bring them to center and do the same on the other side. now take the top two points and put the into the flaps now do the same with the other side.
Step 6: BLOWING IT UP
now find the end with the hole in it and blow into it untill it puffs up.
Step 7: FILLING IT UP