Greetings, Programs!

I’m stacking the deck this week because I’ve been busy - adding 14 (yes, fourteen) new interactive experiments for you to play with and enjoy.

But, first, if you’ve been wondering how I’m building all these things so quickly—or if you just want to hang out and learn how to do it yourself—you need to join us this Sunday, virtually:

• 📅 The Virtual Vibe-a-Thon: Learning to “Vibe Code” with Cursor

• Sunday, Dec 14, 2025 @ 6:00 PM PT

I’m hosting another free virtual event focused on “Vibe Coding” - basically, how to use AI tools like Cursor to do the heavy lifting for you. We’ll be joined by Dan Clem, who approaches this with a product manager’s mindset. Whether you’re a pro or just curious, come hang out. If you build something based on the keyword we drop during the event, you could even win a gift card:

👉 Register for free right here

👧 The 11-Year-Old Case Study

I talk a lot about the theory of “Vibe Coding,” but this week I got a masterclass in the practice from the person I least expected: my 11-year-old daughter.

She didn’t take a Python boot camp. She didn’t spend hours reading documentation. She simply had a problem she wanted to solve (making math practice actually fun) and she used these tools to solve it.

She described the logic, she tweaked the design, and she shipped a fully functional web application entirely on her own volition: Rabbits Multiply!

The result is a complete educational game where solving multiplication problems helps a colony of rabbits grow. It works, it’s polished…

…and it was built by a child.

This is the clearest signal yet that the world has changed. For her, the wall between “consuming an app” and “building an app” has completely vanished. She didn’t know that software development was supposed to be hard, so for her, it wasn’t.

If you are still waiting for “permission” to build your idea, let this be your green light.

If she can do it… you can, too.

👾 New in the Arcade

While you wait for the live stream, I’ve added a massive batch of new vibe coded single-page web apps for you to try! Here is your checklist for the week:

The Holiday Corner

• Christmas Tree Maker: A full 3D interactive decorating game. Drag and drop bulbs, canes, and toppers. It’s safer than a real tree (no needles to vacuum).

• Tinsel Trees: Prefer the procedural look? Generate infinite variations of tinsel-heavy trees. Tweak the foil density and crunchiness to your heart’s content.

• Frosty Pane: A generative ice simulation. Watch the crystals grow across your screen, then use your mouse to melt them away. Oddly satisfying.

Visuals & Zen

• Cloudy Day: A real-time cloud simulation. Adjust the wind speed, cloud coverage, and time of day. Perfect for a second monitor background.

• Aether Flux: A mesmerizing fluid-like visual generator. It’s like a digital lava lamp that reacts to you.

• Electric Ivy: Watch digital flora grow in real-time. You can auto-randomize the fractal settings to keep the garden changing.

• The Blob: An interactive 3D fire visualization. Tweak the billow size and warp speed—just don’t get burned.

• Metal Petal: Interactive neon waves. Great for zoning out or testing your screen’s contrast ratio.

• Orb Ashore: A mathematical visualization engine that proves math can actually be pretty.

• Petalworks: A fractal shader art generator. Put it on slideshow mode and let it run.

Games & Simulations

• System Six: This is a big one. A fully functional retro Mac OS simulator right in your browser. It has a working calculator, notepad, and even games like Connect4.

• Voice Velocity: A synthwave runner game controlled by your voice. Speak to run, shout to jump. (Maybe don’t play this one in the library).

• Claw Machine: A physics-based claw simulator. Customize the grip strength and gravity—finally, a claw machine that isn’t rigged!

Utilities

• Text Replacer: A powerful, secure batch find-and-replace tool. It runs 100% locally in your browser—no files are uploaded. A genuine lifesaver for developers and writers.

Don’t forget to grab your spot for Saturday!

We’re going to be geeking out over how tools like Cursor are changing the game. If you want to see how the sausage is made (or just want to vibe with us), here:

🎟️ Join the Virtual Vibe-a-Thon

Yours Digitally,

Chris Pirillo