Just for Fun · Energize · Collaborate
The Mystery Supply Build
Use ordinary classroom supplies to build a tiny solution to an imaginary school challenge.
Time15–22 minutes
Group size4–50 people
FormatSmall groups, Table groups
MaterialsPaper, Sticky notes, Tape, Markers, Optional cups, index cards, or craft sticks
What this accomplishes
Teams receive a small pile of common supplies and a playful design prompt. They have eight minutes to build a model, tool, or contraption, then share its name and one unexpectedly sensible feature.
- Spark playful collaboration
- Practice rapid idea building with familiar materials
Before you begin
Materials
- Paper
- Sticky notes
- Tape
- Markers
- Optional cups, index cards, or craft sticks
Preparation
- Place a similar small supply pile at each table
- Choose one imaginary design challenge
- Set an eight-minute timer
What to say
“Your table has eight minutes to build a tiny solution to a completely unreasonable school challenge. It does not need to work. It does need a name and one feature you can defend.”
How to run it
- 1
Reveal the design challenge and supply limits.
- 2
Give teams one minute to generate ideas without touching the supplies.
- 3
Start the eight-minute build.
- 4
At halfway, announce an optional plot twist such as ‘It must now fit in a backpack.’
- 5
Ask each team for a 30-second share: the name and one feature.
- 6
Invite the room to applaud useful absurdity rather than rank the builds.
Prompts to use
Build a device that prevents Sunday-night school dreams.
Design a machine that returns every missing pencil.
Create a tool that makes the copier work on the first try.
Build a model of the world's most welcoming staff room.
Adapt it to the room
Small group
Build one object together, with each person responsible for adding one feature.
Large group
Use table teams and display builds in a quick gallery instead of presentations.
Virtual
Give participants five minutes to build with three items within reach, then show and explain in breakout rooms.
Accessibility & inclusion
- Offer roles such as idea generator, builder, label writer, timekeeper, and presenter.
- Do not require standing or fine-motor work from every participant.
- Allow a drawn design instead of a physical model.
Debrief, if useful
What helped your group begin before it had a perfect idea?
What feature improved because someone built on another person's thought?
Why it works—and what can go wrong
Why it works
A playful constraint gives groups permission to experiment, while ordinary supplies lower the stakes and make collaboration visible.
Watch out for
- Do not turn the activity into a contest for artistic skill.
- Avoid waste by reusing clean supplies and dismantling builds afterward.