The principal knew he couldn't afford to offend anyone, nor could he compensate them.
Their kindergarten was the largest aristocratic private kindergarten in Philadelphia, with a powerful boss linked to politics abroad. Most of the parents who sent their children here were prominent figures in the city, none of them could be easily offended. Needless to say, these parents were powerful and influential, and the principal had no choice but to handle the situation in a subtle and tactful manner.
Harry's parents were sitting on the sofa in the headmaster's office, with disposable cups of water in front of them, but neither had taken a sip.