Selexels is a conceptual framework that guides a user interface (UI) designerto adapt a UI to input devices with low expressiveness: devices that havelimited ability to convey intended meaning. By adjusting the interface, theuser can enjoy a fluid and smooth interaction, without suffering from thetechnical weaknesses of the input device, such as low sampling rate or lowresolution. We have evaluated this framework through some user studiesusing Fitts Law. As a proof of concept, we have implemented Selexel Toolkit.Selexel Toolkit can help UI programmers in two ways. The first way is when aprogrammer has already created a UI, working properly with the mouse andkeyboard, but he wants to change the UI code, so that the same UI can beused with an input device, having low expressiveness, such as a mobilephone. In such a case, the Selexel Toolkit adapts the original UI to match theexpressiveness of the input device. The second way is to give programmers anew Layout Manager, in addition to java standard Layout Managers, i.e., anew tool for laying out their UI in a different way with getting advantage oflayout constraints that can also be useful in other application areas.