I know many people have been into this stuff, not sure if still are. The prices are pretty low compared to other stores.
Anki https://www.jbhifi.com.au/collections/factory-scoop?q=&hPP=3…
Sphero https://www.jbhifi.com.au/collections/factory-scoop?q=&hPP=3…
It says expansion car, does it need something else to operate?