She may be the Duchess of Cambridge, but even Kate Middleton enjoys a low-key birthday. A royal source tells Us Weekly that Kate, who turned 37 on Wednesday, Jan. 9, isn’t going the party route for her special day this year. “Kate is at Kensington Palace,” the source says. “It’s just a quiet, ordinary day — with school drop-offs and pick-ups and spending time with the children.” The source adds, “It will be a quiet evening at home celebrating with family.”

But that doesn’t mean that Kate hasn’t had herself quite the day, as a source exclusively told Closer Weekly that “[Prince] George and [Princess] Charlotte have already made their mom birthday cards in their arts and craft class.” The source continued, “We’re sure Kate will be excited to open the thoughtful presents from her little ones when they get home from school, but until then, she’ll be enjoying her ‘adult time’ with her mother, Carole Middleton!”

Kate Middleton Prince William Family
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“Whilst they’re at school during the day, Carole will celebrate with Kate by popping open a bottle of champagne and enjoying a nice lunch!” the insider added. Kate’s husband, Prince William, spent her birthday on a solo trip to the Royal London Hospital, where he became a patron of the London Air Ambulance charity’s 30th anniversary campaign. Kensington Palace confirmed the honor, saying, “The Duke of Cambridge visited @LDNairamb to learn more about the challenges of working as a first responder in the capital #30YearsSavingLives.” They continued, “As #30YearsSavingLives Patron, The Duke of Cambridge will champion those working on the frontline, and highlight the importance of @LDNairamb’s rapid response to incidents, and cutting-edge medical care.”

According to Us Weekly, William accepted a birthday card on his wife’s behalf while at the hospital. “Well done for remembering,” the Duke of Cambridge told the group of children who made the card for Kate. “I did remember this morning, so that was OK!” The next birthday on the Cambridge clan’s list is Prince Louis‘ 1st on April 23 and we’re sure Kate and William will go all-out for that special event!

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