This K'NEX double swing looks like fun!
It can be built using:
1. A K'NEX Base kit.
2.Two Fimbles (or two cuddly toys of similar size).
First, assemble the nine 3D connectors shown in the photo opposite.
Please visit Handy Hint A4 if you need help to do this.
Then build the base of the frame
and the central section of the frame.
Next, add to a grey rod, as shown:
1.Two blue spacers.
2. Four silver spacers.
3. Two purple clips.
4. Four more silver spacers.
5. Two more blue spacers.
Then add the same to a second grey rod
and assemble the frame of the swing, as shown.
Now build the base of a swing seat
..make two swing hangers
plus two support bars
and assemble to create a swing seat.
Then build a second swing seat
and attach both seats to the frame.
Finally, add your Fimbles, and swing them!