One Up One Down

Name and Purpose

One Up One Down is a group puzzle activity that builds observation, listening, and deductive thinking.
Players describe their own body positions while one person tries to decode the pattern, creating a shared moment of discovery.

a.k.a.

Age / Group / Time / Space

Ages 8-16 | 6-30 players | 15-25 minutes | Any seated or standing space, indoors or outdoors; a circle formation works best

Materials

No materials required
Optional: a whiteboard or flip chart to record the guesser’s theories as they work through them

Quick-Run Card

One player (the Guesser) steps outside or covers their ears while the rule is explained to the group.
The rule: players describe the position of their own arms and legs (“1 up, 1 down”; “2 up”; “2 down,” etc.).
The Guesser returns and listens as players describe their positions in turn.
The Guesser tries to deduce the pattern. Players change positions and redescribe as needed.
Once the Guesser identifies the rule, they share it. A new volunteer takes the next turn.

Setup and Boundaries

Sit or stand in a circle so everyone can see each other’s positions
Signal: staff raises a hand to pause; the Guesser can ask for a pause at any time to think
The rule for this round: the numbers in the phrase (1 up, 2 down, etc.) describe the player’s own arms and legs that are raised or lowered, not anything about other players

How to Play

Ask for a Guesser volunteer. The Guesser steps outside or turns away with ears covered.
Staff explains the rule to the group: “You will each describe the position of your own arms and legs. An arm or leg raised or extended = ‘up.’ An arm or leg down or resting = ‘down.’ Count yours and say the phrase that matches: ‘2 up, 2 down’ or ‘1 up, 3 down,’ etc.”
Players take random positions (seated with one leg crossed, arm raised, etc.) and prepare their phrase.
The Guesser returns and moves around the circle, listening to each player say their phrase.
Players can shift positions between turns to give the Guesser new data.
The Guesser shares their theory when ready. If correct, the group confirms it. If not, play continues.
Once solved, celebrate together. Invite a new Guesser for the next round with a different rule variation.

I-OPt Options

Start
- A (Active): Volunteer to be the first Guesser
- S (Support): Help the group understand the rule clearly before the Guesser returns
- Q (Quiet): Choose a simple position and prepare your phrase quietly
- O (Observer): Watch the first round before deciding on a role for round two
Mid
- A (Active): Change positions frequently to give the Guesser more data to work with
- S (Support): Speak your phrase clearly and at a good volume for the Guesser
- Q (Quiet): Keep one consistent position and say your phrase calmly each time
- O (Observer): Track the Guesser’s theories on the whiteboard
Late
- A (Active): Offer a hint if the Guesser is very stuck (e.g., “Look at me, not at someone else”)
- S (Support): Encourage the Guesser with “Getting warmer” or “Good thinking” without giving it away
- Q (Quiet): Keep your phrase consistent and let the Guesser observe you closely
- O (Observer): Count how many turns the Guesser needed and report it as a fun stat after
End
- A (Active): Volunteer to be the Guesser in round two with a new rule variation
- S (Support): Help explain the new rule to the group for round two
- Q (Quiet): Share what you noticed about the Guesser’s reasoning process
- O (Observer): Suggest a new variation for the next round

Inclusion Adaptations

Players who use wheelchairs or have limited limb mobility describe the position of the limbs they can move; the phrase counts only their moveable limbs, and this is stated clearly at the start so all descriptions are valid
Players who are non-verbal or prefer not to speak can hold up a card with their phrase written on it

Stewardship Moment

This activity uses no materials and leaves no trace
Reflection: “This whole game ran on nothing but bodies and words. What activities like this could you teach someone else with no equipment at all?”

Consent

Pre-brief: “This is a puzzle game where you describe your own arm and leg positions. You only share what you choose to do with your own body. For those who’d rather track theories on the board than be in the circle, that role is just as central to the game.”
Mid-game check: Check in with the Guesser after a few rounds to make sure they are enjoying the challenge and not feeling pressured.
Opt-out/re-entry: A player can say their phrase from the edge of the circle or from a seat and re-enter the active circle at any point.

Risks and Mitigation

Guesser becoming frustrated: normalise multiple rounds and celebrate the attempt, not just the solve; offer a hint after 5-6 turns if needed
Players giving away the rule accidentally: remind the group that only the phrase is shared, no extra hints
Garbled phrases causing confusion: model the phrasing clearly before the Guesser returns (“2 up means both arms raised; say it exactly like that”)

Warm-Up Suggestions

“Simon Says”: a quick round to get players comfortable following body-position instructions
“Mirrors”: pairs mirror each other’s arm and leg positions for 60 seconds to warm up spatial awareness

Debrief Questions

What? “What patterns did you look for? What threw you off?”
So What? “What does it feel like to be close to figuring something out? How did you handle not knowing?”
Now What? “Where in school or camp do you have to keep trying even when the answer isn’t obvious yet?”

Cleanup and Reset