Rapid Prototyping & Toys

Go from idea to demo fast: clickable phone prototypes from plain text, git history time-lapses, and microphone-powered browser toys.

3 challenges · All topics

• #008 Whistle Lamp: A Browser Toy You Control with Claps and Whistles
  2026-10-18 · Beginner · Tech toys
  Build a playful browser toy that listens through your microphone and drives a glowing virtual lamp with sound alone. Clap twice to switch it on or off, whistle high or low to sweep the color around th…
• #007 Repo Time-Lapse: Turn Any Git History into a Playable Visual Timeline
  2026-10-17 · Intermediate · Dev tools
  Build a tiny command-line dev tool that reads the git history of any local repository and writes one self-contained HTML file you can open in a browser and press play. Files appear as glowing dots gro…
• #006 Napkin Spec: Turn Plain Text into a Clickable Phone Prototype
  2026-10-16 · Beginner · Rapid prototyping
  Build a tiny prototyping tool where you type an app idea as a few lines of indented plain text and instantly get a clickable phone mockup beside it. Screens, buttons, lists and inputs render live, but…