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Free Space and solidsArt and pattern

Cube with an open window

Six colorful frames form a hollow 5 × 5 × 5 cm cube. Five filled walls enclose a real interior, visible through the sixth, open window.

Age
10+ years
Length
approx. 80 min
Level
Easy
Where you teach
Home
Purpose
Creative
Worksheet Guide (colour) Guide (ink-saving)

Slides for the session

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Show them on a projector or board. Arrow keys move between slides.

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How to run this session

Stages and timing
  1. Six panels: five filled and one window
  2. First corner: bottom D and back B
  3. Add left wall L
  4. Second corner: top T and right wall R
  5. Add window O and turn the cool corner
  6. Join the corners and place the cube on back B
  7. Join the bottom and close the lower corner
  8. Reinforce the cube and check its interior

What gets built

Understand how to assemble six planes by making a small object.

What it practises
  • Joining flat panels into a solid
  • Accounting for joint thickness
  • Checking object stability

Success criteria
  • Five filled walls and one open window.
  • External dimensions of approximately 50 × 50 × 50 mm.
  • The cube stands in turn on each of its five filled walls; the opening reveals the real interior.

What you need
Filament
PLA
Colours
turquoise — D, L, T, orange — B, R, O, purple — tacks, seams, and corner closures
Also
3D pen for PLA, PLA filament in selected colors, Transparent work surface suitable for the pen, with a clear area of at least 190 × 130 mm, Templates printed on plain paper at 100%, Millimeter ruler, Pencil, Regular paper scissors

Files

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Version 2026-09-29 Updated 2026-09-29

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