Corrected entry: When the appliances are leaving the house for the first time, Lampy sees the sun and says something like, "I wonder where the switch is", leading us to believe that he doesn't know what the sun is. However, when everybody is in the mechanical parts warehouse, while they (including Lampy) are singing a song, they look out of the window and call the sun "the sun," meaning that they now know what the sun is. At what point did they all learn this?
Corrected entry: When all the appliances are moving around and cleaning the house, they are not plugged in. However, when they go to find the Master, they need a car battery to travel to the city. And the night of the thunderstorm, they say that the battery died, or is dying, but the grumpy vacuum can still rescue Blanky.