WWII?

The baby in the face of the sun is a metaphor for God. THe fact that how no one pays attention to it shows the moral and ethical bankruptcy of the era at the time. The bright characters make a big show of getting food, which was rare in wartimes. Once could see how lovingly they cherished their custard. In one episode, we see a vacuum-like creature take all the food.

This vacuum-creature is representative of the government, who would ration everything out but keep the brunt for themselves. Also, the vacuum-creature had a moustache that looked a little like Hitler's. Or Mussolini's. The Teletubbies are intent on showing their TV-tummies, perhaps to educate the younger generations on the perils of wartime since schools were reduced to rubble and parents wanted to pass on their knowledge in case they died suddenly.