Material Needed:
Go and get a piece of paper in the color that you want for your whistle. Check here for recommended origami papers.
Step 1:
Now fold it into 4 equal parts the long way, as you can see in figure 1.
Step 2.
Now go and get your scissor. Cut a diamond hole in the center fold, pictured in figure 2.
Step 3.
Now place this front fold upon your mouth and blow into it. You will immediately hear an amazing train whistle. No, there isn't a train in your house, that was you making that noise.
