👻 Pranks & Party Tricks

Your friends will never trust a doorway, chair, or pen in your house again.

Some builds solve problems. These builds create them — specifically, the problem of your friends not being able to trust any surface, object, or doorway in your house ever again. A table that whispers. A hallway that screams. A pen that bites. A camera that roasts you. A bottle that pours upward. An object that floats in mid-air for no apparent reason.

These are the builds you make when pure engineering isn't enough and you need to weaponize it for entertainment. Every one of them is harmless. Every one of them is unforgettable. Every one of them will make someone question reality for at least three seconds.

Builds

Suggested Build Order

Start simple, escalate the chaos:

1. #256 — Shock Pen — Classic. Instant reaction.
2. #319 — Vortex Smoke Ring Cannon — 5-minute build. Giant smoke rings.
3. #254 — Invisible Speaker — Sound from nowhere. Gaslighting as engineering.
4. #255 — Motion Jump Scare — Arduino-triggered terror.
5. #320 — Confetti Cannon Controller — Synchronized celebration explosions.
6. #258 — Self-Pouring Bottle — Defies gravity. Defies explanation.
7. #257 — Insult Camera — Takes your photo, roasts you.
8. #259 — Magnetic Levitating Display — Objects float in mid-air.

Related Categories

• Sound & Music — Audio-based shenanigans
• Light & Visual — Visual tricks and illusions
• Pi & Arduino — More interactive electronics

📚 Reference Guides

• Tools Needed
• Sourcing Guide
• Difficulty & Ratings Guide