Summary

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/dQ6ntlaMSWj

Balloon powered Egg carrying Car. https://youtu.be/LL9ouSes7fA
I used scrap cardboard for the body, CDs for the wheels, bicycle spokes for the axles, paper straws for the axle tubes, and sticky tape.
You could use bamboo BBQ skewers for the axles.
I used 3D printed hubs for the CDs, but I showed in the video that you could use cardboard or bottle caps.
My tools were a sharp knife, scissors, hot glue gun.