The UK prime minister joined children for some painting, showing off his skills and working on what appeared to be a watercolour painting of a banana.
One child brandished a kiwi fruit to the mask-clad prime minister, to which he responded “that is called a kiwi fruit.”
He added: “When I was your age, they didn’t exist.”
Mr Johnson then went on to consider whether or not kiwis were invented saying: “Were they discovered, or were they invented, kiwis? Did they breed kiwi fruits?
“I don’t know…”