⚠️ This is my first mechanical model release.

10.11.2025 Update . The latch have been redesigned for stronger engagement and smoother operation. The mechanism is now reliable during normal use.

Pop-Up Candy Box (LED Edition) is a functional Halloween candy box with a spring-loaded ghost figurine, push-button lid release, and built-in LED light channels inside the double walls.

The box interior is divided into three functional sections:

1. Battery Compartment

Internal bay designed for LED wire battery packs (default: 3 × AA). Internal dimensions: 52 × 77 × 19 mm

If you use a smaller battery pack, install the battery reducer plate to convert the compartment to 2 × AA, preventing battery rattling.

2. Ghost Pop-Up Mechanism

A guide chamber holds a spring-mounted ghost. Pressing the front button releases the lid latch, causing the lid to lift.

3. Candy / Storage Section

The main section holds candy, mini snacks, charms, toys, or surprises.

Assembly Instructions

1. Assemble the Lid

- Print: candybox_lid_v2.stl, lid_latch_v2.stl, and lid_latch_pins_v2.stl.

- Insert the latch into the slot in the lid.

- Secure it using the latch pins. The latch should move freely with a light click.

2. Attach the Lid to the Body

- Print: candybox_body_spring_mount_v2.stl (or the alternative without spring) and hinge_pins_v2.stl.

- Align the lid hinges with the hinge posts on the body.

- Push the hinge pins through both sides to secure the lid.

- The lid should now open and close smoothly.

3. Install the Ghost Spring Mechanism (for spring mount version)

- Print: spring_with_ghost.stl

- Place the spring and ghost into the center chamber (mechanism section).

4. Tune the Mechanism

- Test opening/closing.

- If motion feels stiff or uneven, lightly sand the latch contact surfaces.

5. Add LED Lighting

- The battery compartment internal dimensions: 52 × 77 × 19 mm

Fits most common LED wire battery packs (2× or 3× AA).

- If using a 2× AA pack, print and install battery_reducer_plate.stl to prevent rattling.

- Route LED wire through the double-wall channels.

- Use batteries_clip.stl to keep in place.

Everything is friction-fit. No glue required.

Print Settings

Printer Used: Creality Ender-3 V3 KE

Material: PLA or PETG

Layer Height: 0.2 mm

Walls / Perimeters: 2

Infill: ~20%

Supports: OFF

May require small sanding/tuning, No glue required

Included STL Files

candybox_body_spring_mount_v2.stl – box body with spring-pop ghost mechanism

hinge_pins.stl – 2× hinge pins for lid attachment

candybox_lid_v2.stl – top lid

lid_latch_v2.stl – latch component for lid locking

lid_latch_pins_v2.stl – latch pin connectors

spring_with_ghost.stl – optional spring-ghost sample piece (or placeholder for your figure)

battery_reducer_plate.stl – insert for switching to 2 × AA battery pack

batteries_clip.stl – LED / battery wire routing clip

alternative_candybox_without_spring_mount_v2.stl – box body without ghost spring mount (standard LED version)

Future Updates

This model will receive:

• Christmas Edition version

• Improved version for Halloween 2026

Candy Box Pop-Up LED Edition

0.2mm layer, 2 walls, 15% infill