Tank – siren.
From a piece of ordinary strip with dimensions served in the drawing and the string can be made a very simple and interesting toy. A thin string of length should be dragged through the holes in the slat 1 m and tie his ends. That Bąk "Play", you need to hold the ends of the string in both hands and turn your right hand with your right hand, and the left – in the second. Bąk when developing makes a sound like a factory mermaid.
