This pilot study investigates how integrating auditory, visual, and haptic cues influences implicit learning and short-term memory retention. Participants completed an incidental categorization task followed by immediate and delayed recognition tests under either a visual-only or trimodal condition. Results indicate that trimodal stimulation produced consistently higher recognition accuracy both immediately and after a 20-minute delay, with modest gains in response speed during immediate testing. While limited by a small sample size, these findings suggest that incorporating haptic feedback alongside audiovisual stimuli may strengthen implicit memory traces and reduce decay over time. The study provides a proof of concept for real-time trimodal learning environments and motivates further research on multisensory interaction design for learning and cognition.