Forensics and criminalistics at the end of 20th century won a lot of public attention thanks to popular TV series, such as CSI: Crime Scene Investigation. It has fueled new programs in forensics worldwide. Paper presents practical approach to teaching criminalistics at the Department of Criminalistics, University of Warsaw. Brief description of differences in defining forensics and criminalistics are followed by presenting the development of hands on criminalistics class called CSI: Warsaw. Benefits and downsides of implementing such approach are discussed.