While the weather held, Catherine, who is patron of the museum, and Prince William were shown outdoor learning areas which aim to help people feel more connected to nature.
As it started to rain, Catherine held up her umbrella over some of the children, telling the teachers: “Let them go in, let’s take them inside, it’s pouring.”
Dr John Tweddle, head of the Centre for UK Nature at the museum, said the programme order was adapted due to the capital’s current spell of temperamental weather.
“But the Prince and Princess still had plenty of time with the young people they had come to see,” he added.