Take a square sheet of paper and fold it in half.
Fold in half lengthwise.
Open this section and fold it back on itself along this line.
Flip and repeat on this side.
Now fold this part upward
Repeat for the other side
Then take this point and fold like this down the center line
Repeat on the other side
Take the top and fold it too
When you have this shape, fold this tip inside this part, sliding it in as much as you can after folding it in half.
Repeat for the other side.
Fold both ends toward the centre.
Fold this part in half and then fold inward.
Repeat on the other side.
Once have this shape, open it like this.
You can see a small hole here. Just blow into it to inflate your origami.
Your waterbomb is ready!