People use fidget toys for more than just fun. Some widely reported benefits include:

- **Stress relief:** The repetitive motion of spinning, clicking, or sliding can be calming.
- **Improved focus:** Many users with ADHD, anxiety, or restlessness find that subtle fidgeting helps them concentrate.
- **Tactile stimulation:** Different textures and mechanisms provide satisfying sensory feedback.
- **Customization:** 3D printing lets you fine-tune weight, resistance, and motion to match your preferences.
- **Low cost:** Once you have a printer, most toys only use a few grams of filament.
- **Educational value:** Designing and printing fidgets is an engaging way to learn 3D modeling, tolerances, and mechanical design.

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## Popular Types of 3D Printed Fidget Toys

### 1. Fidget Spinners and Gyros

While the craze has cooled, spinners are still a core 3D printing project:

- **Classic three-arm spinner:** Uses a central bearing and optional weights in the arms.
- **Gyroscopic spinners:** Multiple rings spinning within each other.
- **Low-friction spinners:** Designed around 608 bearings or printed bearing systems.

Design tips:
- Leave a precise bearing cavity (commonly 22 mm diameter for 608 bearings).
- Add fillets or chamfers on edges for comfort.
- Test different arm shapes to change inertia and spin time.

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