Next place the motor on top of the frame, so that the pins fit into the white connector
make the motor support
and attach it as shown.
Finally add to a red rod:
1. A snap cap black. 2. A white connector. 3. A tan clip with the pin pointing towards the white connector. 4. Five silver spacers. 5. A white connector. 6. A tan clip with the pin pointing towards the white connector. 7. A blue spacer.
Push the tan clips along the rod, so that they engage with the white connectors.
Then push the end of the grey rod through the motor as shown.
Your base is now complete.
Test the model by turning on the motor. The two white connectors rotate.
Think how you could attach more K'NEX rods and connectors to the white connectors, to make a Theme Park ride.
For instance, the lower part of the ride might become a carousel, and the upper part of the ride some form of spinning, seated ride.