The Duchess of Cambridge is concerned her children Prince George, Princess Charlotte and Prince Louis will be scared by the coronavirus pandemic.
Kate and husband Prince William are following social distancing and self-isolating guidelines at their Norfolk home Anmer Hall, and they are also homeschooling their elder two children.
However Kate admitted she is worried about scaring the children, and has explained how they are explaining the situation.
Speaking to the BBC's Tina Daheley, Kate said: "There have been ups and downs, probably like lots of families. With self-isolating, George is much older than Louis is but they are aware.
"You don't want to scare them and make it too over-whelming.
"I think it is appropriate to acknowledge it in the simple ways and in the age appropriate ways."
The couple also spoke about homeschooling George and Charlotte, and admitted they made they work through the Easter holidays.
Kate said: "Don't tell the children, we've actually kept it going through the holidays. I feel very mean."
The duke described homeschooling as "fun" - and his wife added it was "challenging"
In the interview, William spoke about what it was like when his dad Prince Charles was diagnosed with the deadly illness.
Charles, 71, who is more at risk from the disease due to his age, was the first member of the royal family to test positive for Covid-19 but got the all clear from doctors after self-isolating for a week.
William said" "At first I was quite concerned - he fits the profile of somebody, at the age he is, who is fairly risky.
"I was a little bit worried, but I thought if anybody is going to beat this, it's going to be him."
The Duke also spoke about the importance of looking after our mental health during lockdown - and offered advice on how to deal with grief.
He said: "People are going to feel angry, they are going to feel confused, they are going to feel scared - all normal feelings and that is unfortunately all part of the grieving process.
"But don't underestimate again the importance of reaching out, the importance of looking to your family and friends."
