Ok this was a fun Gemini 4 Argon + Antigravity experiment I made this morning - an interactive "petting zoo" for my kids. You walk around a little 3D farm with the arrow keys, and when you get close to an animal, it starts talking to you. Each one tells you fun facts about itself in first person. Under the hood Argon used: Nano Banana for the art, Blender for the 3D models, Three.js to run it in the browser, Gemini text-to-speech for the animal voices, and Lyria for the music.