I'm in the final stages of prototyping a project for a ESB Boba buddy. Essentially, I've created electronic spurs that play the sound heard when Boba walks in ESB. The electronics are small enough to put in a pocket (think tic tac box small, but not including battery pack and speaker), and trigger the sound with every step. They can either be played through an existing speaker on your kit, such as an Aker, or on separate speakers.
I'm wondering what the interest would be from the community if I were to make more of these to sell. I'm ball-parking about $150 for a complete kit, depending on volume.
Let me know whether there is interest in this, and if so, I'll take some pictures and video, and refine pricing.