Hey this is my first instructable so don't be too harsh... Anyway, just a simple see saw for you to make from knex. If you have any ways I could improve my instructables, just comment! Enjoy!
NOTE: I can't change my main picture. I keep trying but it keeps going back to this stupid parts sheet. Sorry!

Step 1: Step One

First, you need to gather all the pieces. (I'm doing this in the smaller version of knex by the way) You will need...

- 3 Yellow Rods                                                                           -2 Black Rods
- 4 Red Connectors                                                                    - 2 Purple Connectors
- 4 Blue Slidy Connector Things                                              - 4 Grey Rods
- 4 Green Connectors with hole                                               - 4 Orange Connectors
- 4 Purple Rods                                                                           - 2 Red Rods

Step 2: Step One

Now you need to make two triangles. You can see what to do from the picture. Remember to make two of these.

Step 3: Step Two

Take two blue slidy things and slide them together. Connect these to the top of your triangle you made a second ago. (Remember to do it to both triangles.) Put this to the side, you will need them later.

Step 4: Step Three

Get your purple connector and put one purple rod on each side of it. (Make two of these.) Put these to the side, you will need them a bit later too.

Step 5: Step Four

Take a black rod, and clip a green connector to each side of the rod. Then slide a purple connector onto the black rod.

Step 6: Step Five

Take a yellow rod, and clip two red connectors onto it. Then take the thing you made a minute ago and clip the purple connector from it onto the middle of the yellow rod. Make two of of these and they will be the seats.

Step 7: Step Six

Take the two purple stick things you made earlier, and slide a yellow rod through the holes in the middle of them. Connect the yellow rod to the blue connectors on top of the triangles you made earlier. Then take the two seats you made, and connect them to the other end of the purple rods.
Well Done, you're finished!!!
Thanks for using my instructable, and don't forget to put any improvments for me in the comments box! Bye!