One of My Coolest Inventions

I just found this on my computer. It's the original Spider Tank Mark 5 that eventually became a successful toy in stores.
This one is actually better than the final version in many ways even though it was 3D printed and a little rough. The ping pong baller (charge cannon) could shoot different distances very accurately. The efficiency of the walking was excellent, and I have to admit... I think this one looks the coolest even after significant changes to make the final version.