In this instructable I will show you how to make a very small and simple piston out of knex. This is lever activated but can be modified to be circular motion activated.

Step 1: The Frame

make what is shown in the pictures. This will be the frame.

Step 2: Make the Piston Part

This will be the piston and lever.

Step 3: Completion

Follow the pictures.
watch in picture 4 for the blue clips.
move the black peice back and forth and the rods will go in and out.
<p>Neat! I like the simplicity of it.</p>
Thank you very much.

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