We present some thoughts about devising educational designs for experiments with the use of e-tools in computer science education. We stress that the focus should not be on technological issues but on educational design issues. Our intention is twofold. First of all it is proposed to gather information about the use of such tools, in order to compose guidelines and hints for computer science lecturers. Next, we propose to design and conduct new promising experiments about using e-tools within the context of computer science education.