Cognitive stimulation workshops (CSW) are recommended for elderly people with a decline in cognitive functions, for example, mild cognitive impairment. Information and Communication Technology (ICT) has the potential to enrich and facilitate preparation, facilitation and assessment of CSW interventions. We present the first steps of our co-design approach towards a Web 2.0 based software, called STIMULEE, for the design and the facilitation of CSW. Its achievement will provide novel therapeutic practices to our clinical partners.