The Teletubbies

Childhood entertainment
Somebody else's science experiment

Think about it:

•4 almost identical beings - each a different colour with a different shape on their heads -
•who seemingly live on regular Earth (they're seen on grassy hills with non-animated wild rabbits)
•but are partially made up of technology (the screens in their stomachs)
•and only eat toast and pink custard
•and are watched over by a face in a sun
•who are looked over by voice trumpets and a supposedly sentient hoover
•in a very secluded area bc the only other living things around them are the rabbits.

THE SUN:

You remember how the Glade worked in The Maze Runner, right?
*Spoiler if not*
Fake sky.
Fake sky, baby face in the sun to act as a camera "they" see through. A smiling laughing baby isn't going to make anyone suspicious of it, right? Perfect facade.

THE VOICE TRUMPETS:

Easy. It's how "they" communicate with the Teletubbies and input stimuli to test their reactions.

PRETTY EMPTY FIELD:

Limit outside influence.

NOO NOO (THE HOOVER):

Basically the same as the sun but for while they're in the bunker. It's how "they" assure the Teletubbies get fed only tubby toast and tubby custard and check in on them.

All of this makes complete sense
Doesn't mean it's true
But it makes complete sense

Think about it

How else did they come into existence when they all look to be:
•the same age
•genderless