The Duchess of Cornwall revisited her youth when she met young people at a Kuwaiti hospital and spent time with them blowing bubbles.
Camilla is on a 10-day tour of Gulf states with Prince Charles
Camilla was attending a fact-finding tour of a Kuwait City hospital when she met youngsters coping with leukaemia.
She also visited a centre for children with learning difficulties.
The Duchess and the Prince of Wales are on a 10-day tour of Gulf states to "reinforce Britain's friendship with key allies".
Camilla was being shown the work of the Kuwait Association for the Care of Children Hospital when she gave her impromptu display.
That association employs specialists who use play to help children cope with the stress and pain of hospital procedures.
Camilla, who turns 60 this year, met leukaemia patient Farah Ahmad who was making bubbles to "blow away" her anxieties.
When the Duchess said she liked Farah's Kuwaiti-flag brooch, which had a flashing light, the youngster immediately pinned it on her.
Earlier she toured the Centre for Child Evaluation and Teaching, which works with children with learning disabilities.
Charles and Camilla, who flew into the Gulf on Monday, began the day with a formal meeting with Kuwait's Emir, Crown Prince and Prime Minister at Bayan Palace.
Clarence House said the discussions touched on topics including the Middle East peace process, Iran and climate change.
The trip will take in visits to Kuwait, Qatar, Bahrain and the United Arab Emirates.
It is likely to be the last major engagement for Camilla before her hysterectomy operation.