"Yay! Presents!" squeals Man Yin-fong, 5, as volunteers enter his hospital ward with trolleys of toys.
Yin-fong, who has been in hospital for a week because of blood vessel inflammation, bounces excitedly on his bed. Volunteers from Credit Suisse, led by the staff of Playright Children's Play Association, play "hospital bingo" with him and his neighbour on a bed.
"Spending time with children in the ward, understanding the importance of what Playright does in helping hospital staff to provide more holistic care for the children, was really worthwhile," said Liza Green of the bank's Corporate Citizenship Asia Pacific.
Operation Santa Claus (OSC), a holiday appeal jointly organised by the South China Morning Post and RTHK, is raising funds for Playright and 17 other charities this year.
Playright believes that play is a powerful part of children's lives and that they have the right to play even in hospital.
"Play is a special kind of medicine that helps ill children recover," the community and hospital manager Blondi Kwok Ming-chau told the volunteers.
The staff and volunteers played bingo with the children during their visit last week to the Pamela Youde Nethersole Eastern Hospital. But instead of drawing numbers, they drew pieces of miniature medical equipment from a box and the children circled the pictures.
Kwok explained that incorporating hospital elements into games helped children overcome their fears.
Credit Suisse identified with the work of Playright as it was in line with its charity focus on children and education, said Brian Tang, director of investment banking (legal) and chairman of the charity committee.
The bank also raised funds for OSC at its office staff party last week.
"We hope we will have more opportunities to come again and spend time with the children, connect with them and help them feel less alienated," he said.
Nicole Yuen, vice-chairman for Greater China and chair of this year's staff party, also found the experience rewarding.
"We spend most of the day in the office, so to come out, to see people smiling, to see the love that is filling the space, it is just tremendous for us. So probably we got more from this exercise than the children," she said.
How You Can Give
Donate online by credit card at osc.scmp.com 
Donate at an ATM or at any HSBC branch (account no: 502-676299-001 for SCMP Charities Ltd - Operation Santa Claus)
You can donate with a cheque payable to "SCMP Charities Ltd - Operation Santa Claus" and mail it to: Operation Santa Claus, Morning Post Centre, 22 Dai Fat Street, Tai Po Industrial Estate, New Territories
Donations of HK$100 or more are tax-deductible. If you would like a tax receipt, please send the completed donation form and original bank receipt, with your name, address and phone number, to the above address. Please call 2680 8159 or e-mail firstname.lastname@example.org  with any inquiries, or visit us online at osc.scmp.com