This study extended Battery-free wireless mouse functionality to assess whether two people with developmental disabilities would be able to actively perform designated simple occupational activities according to simple instructions by controlling their favorite environmental stimulation using Battery-free wireless mice with a newly developed extended object location detection program (EOLDP). This study was performed according to an ABAB sequence in which A represented the baseline and B represented intervention phases. Data showed that both participants significantly increased their target responses (performing a designated occupational activity) by activating the control system to produce their preferred environmental stimulation during the intervention phases. Practical and developmental implications of the findings are discussed. (Contains 4 figures.)