This is my kid’s favorite cartoon. It’s stupid and hilarious. I wonder you might not understand the jokes because they are very Japanese.
In this episode, Tamama is putting on the mark with green and yellow on his head and chest.
This is called ‘Wakaba-mark’ or ‘Shoshinsha-mark’. In Japan, the new driver has to display this mark both on front and back of a car to warn other drivers to be careful because the driver marked this sign is the beginner.