I've been watching a lot of In The Night Garden with Baby Moonbase.
Its a hypnotic slice of surreal Kids TV.
One feature is the fun train, the Ninky Nonk. Its middle section is a vehicle shaped like an onion.
Whenever I see it I always think of this onion-like toy vehicle from Space 1999 by LJN, 1976.
I don't know much about this toy. Did the vehicle feature in Space 1999?
Come to think of it this toy reminds me of the Mechanoids from Dr. Who! You?