Roly-Poly Penny & Koruna Egg
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A self-righting 3D printed egg with a penny-weighted base — always lands upright! Perfect Easter desk toy or decoration.
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Model information
- Source
- Printables
- Category
- Spring & Easter
- License
- Creative Commons — Attribution — Noncommercial
**Koruna version added for my friends in The Czech Republic use 8 Korunas.
Both versions are designed with tight tolerances insuring the weight is perfectly balanced and concentric to the center
The Roly-Poly Penny Egg is a fun, self-righting Easter egg that always stands upright — no stand needed! The secret is a small pocket recessed into the bottom that holds 9 pennies, lowering the center of gravity so the egg naturally rocks back to vertical every time, just like a classic roly-poly toy.
Print Settings:
Layer Height: 0.15mm for a smoother, rounder bottom curve
Raft: Enabled with 15 layers to prevent base warping and ensure a clean, stable first layer
Z Seam: Set to Random to eliminate visible seam lines and keep that smooth egg appearance
Pause Print Command: Add the pause right before it gets sealed up too drop in the 9 pennies
Assembly & Instructions:
Start your print as normal
Drop all 9 pennies into the pocket while the print is paused
Resume the print — the remaining layers will seal the pennies inside automatically
Once complete, set it down and watch it always bounce back upright!
Great as an Easter decoration, desk toy, or gift. Kids love it!