It should look like this:
Then comes the hardest part. You can see six triangles? Take the smallest four and tuck them inside the largest two.
I find it useful to shape it like a cone while folding the first time.
When you finish with both sides, it should look something like this:
The picture on the left shows what you should be seeing if you look t it through the top.
Then, fold up the two corners to make a diamond on one side at a time.
It should look like the below:
Then,fold in the sides of the diamond to look like the picture(I often have to tape it so it stays put).
After that, fold the flaps on the top in, then do the same thing on the other side so it looks like the below geometrical shape... a somethingagon...
So here's the fun part; when your ready to use your water bomb, you blow up the somethingagon through the open end(in the finished picture its the bottom part). it will look something like a cube.
So here, you see the pictures of before, after, and after. hope you have fun!