Scalextric Official YouTube Channel
https://www.youtube.com/user/OfficialScalextric 

Classic Batman & Robin Slot Car racing #1
Season 2 - Episode 25 "Come Back, Shame" this scene is at the very beginning of the episode. 


 

Classic Batman & Robin Slot Car racing #2
Season 2 - Episode 60 "The Duo Defy" this scene is at the very end of the episode.

How It's Made - Model Racing Cars 
This is a short but well done video of the overall manufacturing process of toy racing cars.