When I was child, I used to make some toys.
First, I made a boat with paper.
For a big boat, you have to use a big size of a copybook sheet of paper.
Second, I fold the paper in half.
Then fold up the sides in an angle of 45 degrees.
When we done to make it, we put it in a water surface for sailing.
About the slingshots, when I was child we used to make them
in the same meaning as in the course.
We use the slingshots to play game as
: set down a bottle of water in a little bit distance and try to shoot it.
The first arrived to shoot the bottle has one point.
And the one who has the most points is the winner.