The purpose of such a team building exercise is not to help the sick kids, but rather to do something that requires a lot of cooperation and interaction with yo

The purpose of such a team building exercise is not to help the sick kids, but rather to do something that requires a lot of cooperation and interaction with your coworkers, so that you can get to know better their personality and behavior, and create habits and make emotional changes in the way you interact with them, which can in theory make you more effective at later working with them on problems that the company cares about. Of course, it's not necessarily an effective use of time.