Overall, the first prototype of this tangible education toolkit did achieve our design goal. From the user feedback, it shows the CodeRhythm do able to enhance programming learning experience of blind and visually impaired (BVI) novice learners. However, there still some problems spotted during the process and should be further modify in the next version of the prototype.
When relative humidity is high, the plywood is very likely to get damp and bend, which eventually affect the contact surface and leads to unstable connection between two blocks. This problem did actually occurred several times during the prototyping process, especially in rainy days. Materials such as acrylic, mental, or even engineered wood can be used to replace plywood for better connections.
Fig. 2. correct orientation (left), incorrect but possible orientation (right)
Fig. 3. new appearance design to prevent incorrect orientation
Fig. 4. more tactile indicator is needed to indicate the left to right signal direction