What can be cooked with just a kettle/hot water?

OK, so I work in a homelessness service. A lot of clients of mine, enter Crisis Care which means that they end up in a motel. These are really cheap and kind of not somewhere where people want to be. There is a further problem - many clients report that they have to spend all of their money (which isn't a lot) on takeaway food - as they can't cook in the room (yes, they do know about hot meals at various spots provided by various charities - but often dont have transport). Anyhows.... the rooms usually just have a kettle in them. So, cooking choices are very limited. I'm wanting to create a bit of a menu of ideas for families in Crisis Care accommodation that they can make - with the only available thing to use being hot water. I know about two minute noodles and rice - but I'd like some other ideas :-)