We do hold Kris Kringle each year. Employees nominate to be involved. We have a $10 limit and remind staff that gifts must be appropriate for the workplace and not offensive etc. People pull a name out of the hat and buy for that person.
HR sends out a memo every year encouraging people to have fun over the Christmas season but to ensure they and are those around them are safe and that they are sensitive about Kris Kringle presents being bought. We open them on our last day of work, with all those participating watching. We've had great fun presents and no problems for many years.