Piranha Plant

The motion of Kristal’s Dragonfly model inspired me to build a functional LEGO version of the classic Piranha Plant from Super Mario Brothers. Although it shares some similar motion to the Dragonfly model, the mechanics are quite a bit different. Watch the video to see it in action and to learn how it works.

Although the mechanics ended up being fairly straight forward in the end, it took a lot of time and effort to get to that point. Often, the biggest challenge with models like these is getting everything to fit in the space required. I was determined to keep the pipe no larger than 10×10 studs in diameter, which meant I had to fit everything in an 8×8 interior space, minus the corners that make it ’round’.

In addition, I really wanted the crank to be on the back of the model. You may notice that on the demo model I show in the video, the crank is on the side of the model, which is the easiest and most logical place for it to go given the orientation of the chain drive. It actually took some significant rebuilding to fit all the gears needed to move the crank to the back, without interfering with the space required for rest of the mechanics when the plant was fully retracted.

In the end, it was time well spent, as I’m really happy with how it turned out.

Pirhana Full


9 thoughts on “Piranha Plant

  1. Are we ever going to see instructions on how to build this as i would really like to make this

  2. CAN you do the building guide please please please.

  3. Please make instructions for this!!! I’d love one of these!

  4. I would also love to build this kit for my roommate if you were to ever publish instructions. He’s an avid Nintendo fan and would love something like this for his birthday or something. I’ve gleaned some information from the YouTube video but some aspects are still unclear. Great work as always!

  5. Love the idea for piranha plant just wondering if you had instructions for this model if not thank you anyways and really enjoy the models that you build. Very genius

    • Thanks, glad you like it. Unfortunately, I haven’t put together instructions for it. If I do, I’ll be sure to post about it.

      • I second that inquiry. Very interested in making one of these for my wife.

  6. Make a video on how to build the mechanism AND everything on top of that.

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